text: 'use strict';
  
  /* jshint ignore:start */
  /**
   * This code was generated by
   * \ / _    _  _|   _  _
   *  | (_)\/(_)(_|\/| |(/_  v1.0.0
   *       /       /
   */
  /* jshint ignore:end */
  
  var Q = require('q');  /* jshint ignore:line */
  var _ = require('lodash');  /* jshint ignore:line */
  var util = require('util');  /* jshint ignore:line */
  var DeliveryReceiptList = require(
      './message/deliveryReceipt').DeliveryReceiptList;
  var Page = require('../../../../base/Page');  /* jshint ignore:line */
  var deserialize = require(
      '../../../../base/deserialize');  /* jshint ignore:line */
  var serialize = require('../../../../base/serialize');  /* jshint ignore:line */
  var values = require('../../../../base/values');  /* jshint ignore:line */
  
  var MessageList;
  var MessagePage;
  var MessageInstance;
  var MessageContext;
  
  /* jshint ignore:start */
  /**
   * Initialize the MessageList
   *
   * PLEASE NOTE that this class contains beta products that are subject to change.
   * Use them with caution.
   *
   * @constructor Twilio.Conversations.V1.ConversationContext.MessageList
   *
   * @param {Twilio.Conversations.V1} version - Version of the resource
   * @param {string} conversationSid -
   *          The unique ID of the Conversation for this message.
   */
  /* jshint ignore:end */
  MessageList = function MessageList(version, conversationSid) {
    /* jshint ignore:start */
    /**
     * @function messages
     * @memberof Twilio.Conversations.V1.ConversationContext#
     *
     * @param {string} sid - sid of instance
     *
     * @returns {Twilio.Conversations.V1.ConversationContext.MessageContext}
     */
    /* jshint ignore:end */
    function MessageListInstance(sid) {
      return MessageListInstance.get(sid);
    }
  
    MessageListInstance._version = version;
    // Path Solution
    MessageListInstance._solution = {conversationSid: conversationSid};
    MessageListInstance._uri = `/Conversations/${conversationSid}/Messages`;
    /* jshint ignore:start */
    /**
     * create a MessageInstance
     *
     * @function create
     * @memberof Twilio.Conversations.V1.ConversationContext.MessageList#
     *
     * @param {object} [opts] - Options for request
     * @param {string} [opts.author] -
     *          The channel specific identifier of the message's author.
     * @param {string} [opts.body] - The content of the message.
     * @param {Date} [opts.dateCreated] - The date that this resource was created.
     * @param {Date} [opts.dateUpdated] - The date that this resource was last updated.
     * @param {string} [opts.attributes] -
     *          A string metadata field you can use to store any data you wish.
     * @param {string} [opts.mediaSid] -
     *          The Media SID to be attached to the new Message.
     * @param {message.webhook_enabled_type} [opts.xTwilioWebhookEnabled] -
     *          The X-Twilio-Webhook-Enabled HTTP request header
     * @param {function} [callback] - Callback to handle processed record
     *
     * @returns {Promise} Resolves to processed MessageInstance
     */
    /* jshint ignore:end */
    MessageListInstance.create = function create(opts, callback) {
      if (_.isFunction(opts)) {
        callback = opts;
        opts = {};
      }
      opts = opts || {};
  
      var deferred = Q.defer();
      var data = values.of({
        'Author': _.get(opts, 'author'),
        'Body': _.get(opts, 'body'),
        'DateCreated': serialize.iso8601DateTime(_.get(opts, 'dateCreated')),
        'DateUpdated': serialize.iso8601DateTime(_.get(opts, 'dateUpdated')),
        'Attributes': _.get(opts, 'attributes'),
        'MediaSid': _.get(opts, 'mediaSid')
      });
      var headers = values.of({'X-Twilio-Webhook-Enabled': _.get(opts, 'xTwilioWebhookEnabled')});
  
      var promise = this._version.create({uri: this._uri, method: 'POST', data: data, headers: headers});
  
      promise = promise.then(function(payload) {
        deferred.resolve(new MessageInstance(
          this._version,
          payload,
          this._solution.conversationSid,
          this._solution.sid
        ));
      }.bind(this));
  
      promise.catch(function(error) {
        deferred.reject(error);
      });
  
      if (_.isFunction(callback)) {
        deferred.promise.nodeify(callback);
      }
  
      return deferred.promise;
    };
  
    /* jshint ignore:start */
    /**
     * Streams MessageInstance records from the API.
     *
     * This operation lazily loads records as efficiently as possible until the limit
     * is reached.
     *
     * The results are passed into the callback function, so this operation is memory
     * efficient.
     *
     * If a function is passed as the first argument, it will be used as the callback
     * function.
     *
     * @function each
     * @memberof Twilio.Conversations.V1.ConversationContext.MessageList#
     *
     * @param {object} [opts] - Options for request
     * @param {number} [opts.limit] -
     *         Upper limit for the number of records to return.
     *         each() guarantees never to return more than limit.
     *         Default is no limit
     * @param {number} [opts.pageSize] -
     *         Number of records to fetch per request,
     *         when not set will use the default value of 50 records.
     *         If no pageSize is defined but a limit is defined,
     *         each() will attempt to read the limit with the most efficient
     *         page size, i.e. min(limit, 1000)
     * @param {Function} [opts.callback] -
     *         Function to process each record. If this and a positional
     *         callback are passed, this one will be used
     * @param {Function} [opts.done] -
     *          Function to be called upon completion of streaming
     * @param {Function} [callback] - Function to process each record
     */
    /* jshint ignore:end */
    MessageListInstance.each = function each(opts, callback) {
      if (_.isFunction(opts)) {
        callback = opts;
        opts = {};
      }
      opts = opts || {};
      if (opts.callback) {
        callback = opts.callback;
      }
      if (_.isUndefined(callback)) {
        throw new Error('Callback function must be provided');
      }
  
      var done = false;
      var currentPage = 1;
      var currentResource = 0;
      var limits = this._version.readLimits({
        limit: opts.limit,
        pageSize: opts.pageSize
      });
  
      function onComplete(error) {
        done = true;
        if (_.isFunction(opts.done)) {
          opts.done(error);
        }
      }
  
      function fetchNextPage(fn) {
        var promise = fn();
        if (_.isUndefined(promise)) {
          onComplete();
          return;
        }
  
        promise.then(function(page) {
          _.each(page.instances, function(instance) {
            if (done || (!_.isUndefined(opts.limit) && currentResource >= opts.limit)) {
              done = true;
              return false;
            }
  
            currentResource++;
            callback(instance, onComplete);
          });
  
          if ((limits.pageLimit && limits.pageLimit <= currentPage)) {
            onComplete();
          } else if (!done) {
            currentPage++;
            fetchNextPage(_.bind(page.nextPage, page));
          }
        });
  
        promise.catch(onComplete);
      }
  
      fetchNextPage(_.bind(this.page, this, _.merge(opts, limits)));
    };
  
    /* jshint ignore:start */
    /**
     * Lists MessageInstance records from the API as a list.
     *
     * If a function is passed as the first argument, it will be used as the callback
     * function.
     *
     * @function list
     * @memberof Twilio.Conversations.V1.ConversationContext.MessageList#
     *
     * @param {object} [opts] - Options for request
     * @param {number} [opts.limit] -
     *         Upper limit for the number of records to return.
     *         list() guarantees never to return more than limit.
     *         Default is no limit
     * @param {number} [opts.pageSize] -
     *         Number of records to fetch per request,
     *         when not set will use the default value of 50 records.
     *         If no page_size is defined but a limit is defined,
     *         list() will attempt to read the limit with the most
     *         efficient page size, i.e. min(limit, 1000)
     * @param {function} [callback] - Callback to handle list of records
     *
     * @returns {Promise} Resolves to a list of records
     */
    /* jshint ignore:end */
    MessageListInstance.list = function list(opts, callback) {
      if (_.isFunction(opts)) {
        callback = opts;
        opts = {};
      }
      opts = opts || {};
      var deferred = Q.defer();
      var allResources = [];
      opts.callback = function(resource, done) {
        allResources.push(resource);
  
        if (!_.isUndefined(opts.limit) && allResources.length === opts.limit) {
          done();
        }
      };
  
      opts.done = function(error) {
        if (_.isUndefined(error)) {
          deferred.resolve(allResources);
        } else {
          deferred.reject(error);
        }
      };
  
      if (_.isFunction(callback)) {
        deferred.promise.nodeify(callback);
      }
  
      this.each(opts);
      return deferred.promise;
    };
  
    /* jshint ignore:start */
    /**
     * Retrieve a single page of MessageInstance records from the API.
     *
     * The request is executed immediately.
     *
     * If a function is passed as the first argument, it will be used as the callback
     * function.
     *
     * @function page
     * @memberof Twilio.Conversations.V1.ConversationContext.MessageList#
     *
     * @param {object} [opts] - Options for request
     * @param {string} [opts.pageToken] - PageToken provided by the API
     * @param {number} [opts.pageNumber] -
     *          Page Number, this value is simply for client state
     * @param {number} [opts.pageSize] - Number of records to return, defaults to 50
     * @param {function} [callback] - Callback to handle list of records
     *
     * @returns {Promise} Resolves to a list of records
     */
    /* jshint ignore:end */
    MessageListInstance.page = function page(opts, callback) {
      if (_.isFunction(opts)) {
        callback = opts;
        opts = {};
      }
      opts = opts || {};
  
      var deferred = Q.defer();
      var data = values.of({
        'PageToken': opts.pageToken,
        'Page': opts.pageNumber,
        'PageSize': opts.pageSize
      });
  
      var promise = this._version.page({uri: this._uri, method: 'GET', params: data});
  
      promise = promise.then(function(payload) {
        deferred.resolve(new MessagePage(this._version, payload, this._solution));
      }.bind(this));
  
      promise.catch(function(error) {
        deferred.reject(error);
      });
  
      if (_.isFunction(callback)) {
        deferred.promise.nodeify(callback);
      }
  
      return deferred.promise;
    };
  
    /* jshint ignore:start */
    /**
     * Retrieve a single target page of MessageInstance records from the API.
     *
     * The request is executed immediately.
     *
     * If a function is passed as the first argument, it will be used as the callback
     * function.
     *
     * @function getPage
     * @memberof Twilio.Conversations.V1.ConversationContext.MessageList#
     *
     * @param {string} [targetUrl] - API-generated URL for the requested results page
     * @param {function} [callback] - Callback to handle list of records
     *
     * @returns {Promise} Resolves to a list of records
     */
    /* jshint ignore:end */
    MessageListInstance.getPage = function getPage(targetUrl, callback) {
      var deferred = Q.defer();
  
      var promise = this._version._domain.twilio.request({method: 'GET', uri: targetUrl});
  
      promise = promise.then(function(payload) {
        deferred.resolve(new MessagePage(this._version, payload, this._solution));
      }.bind(this));
  
      promise.catch(function(error) {
        deferred.reject(error);
      });
  
      if (_.isFunction(callback)) {
        deferred.promise.nodeify(callback);
      }
  
      return deferred.promise;
    };
  
    /* jshint ignore:start */
    /**
     * Constructs a message
     *
     * @function get
     * @memberof Twilio.Conversations.V1.ConversationContext.MessageList#
     *
     * @param {string} sid -
     *          A 34 character string that uniquely identifies this resource.
     *
     * @returns {Twilio.Conversations.V1.ConversationContext.MessageContext}
     */
    /* jshint ignore:end */
    MessageListInstance.get = function get(sid) {
      return new MessageContext(this._version, this._solution.conversationSid, sid);
    };
  
    /* jshint ignore:start */
    /**
     * Provide a user-friendly representation
     *
     * @function toJSON
     * @memberof Twilio.Conversations.V1.ConversationContext.MessageList#
     *
     * @returns Object
     */
    /* jshint ignore:end */
    MessageListInstance.toJSON = function toJSON() {
      return this._solution;
    };
  
    MessageListInstance[util.inspect.custom] = function inspect(depth, options) {
      return util.inspect(this.toJSON(), options);
    };
  
    return MessageListInstance;
  };
  
  
  /* jshint ignore:start */
  /**
   * Initialize the MessagePage
   *
   * PLEASE NOTE that this class contains beta products that are subject to change.
   * Use them with caution.
   *
   * @constructor Twilio.Conversations.V1.ConversationContext.MessagePage
   *
   * @param {V1} version - Version of the resource
   * @param {Response<string>} response - Response from the API
   * @param {MessageSolution} solution - Path solution
   *
   * @returns MessagePage
   */
  /* jshint ignore:end */
  MessagePage = function MessagePage(version, response, solution) {
    // Path Solution
    this._solution = solution;
  
    Page.prototype.constructor.call(this, version, response, this._solution);
  };
  
  _.extend(MessagePage.prototype, Page.prototype);
  MessagePage.prototype.constructor = MessagePage;
  
  /* jshint ignore:start */
  /**
   * Build an instance of MessageInstance
   *
   * @function getInstance
   * @memberof Twilio.Conversations.V1.ConversationContext.MessagePage#
   *
   * @param {MessagePayload} payload - Payload response from the API
   *
   * @returns MessageInstance
   */
  /* jshint ignore:end */
  MessagePage.prototype.getInstance = function getInstance(payload) {
    return new MessageInstance(this._version, payload, this._solution.conversationSid);
  };
  
  /* jshint ignore:start */
  /**
   * Provide a user-friendly representation
   *
   * @function toJSON
   * @memberof Twilio.Conversations.V1.ConversationContext.MessagePage#
   *
   * @returns Object
   */
  /* jshint ignore:end */
  MessagePage.prototype.toJSON = function toJSON() {
    let clone = {};
    _.forOwn(this, function(value, key) {
      if (!_.startsWith(key, '_') && ! _.isFunction(value)) {
        clone[key] = value;
      }
    });
    return clone;
  };
  
  MessagePage.prototype[util.inspect.custom] = function inspect(depth, options) {
    return util.inspect(this.toJSON(), options);
  };
  
  
  /* jshint ignore:start */
  /**
   * Initialize the MessageContext
   *
   * PLEASE NOTE that this class contains beta products that are subject to change.
   * Use them with caution.
   *
   * @constructor Twilio.Conversations.V1.ConversationContext.MessageInstance
   *
   * @property {string} accountSid -
   *          The unique ID of the Account responsible for this message.
   * @property {string} conversationSid -
   *          The unique ID of the Conversation for this message.
   * @property {string} sid -
   *          A 34 character string that uniquely identifies this resource.
   * @property {number} index - The index of the message within the Conversation.
   * @property {string} author -
   *          The channel specific identifier of the message's author.
   * @property {string} body - The content of the message.
   * @property {object} media -
   *          An array of objects that describe the Message's media if attached, otherwise, null.
   * @property {string} attributes -
   *          A string metadata field you can use to store any data you wish.
   * @property {string} participantSid -
   *          The unique ID of messages's author participant.
   * @property {Date} dateCreated - The date that this resource was created.
   * @property {Date} dateUpdated - The date that this resource was last updated.
   * @property {string} url - An absolute URL for this message.
   * @property {object} delivery -
   *          An object that contains the summary of delivery statuses for the message to non-chat participants.
   * @property {string} links - The links
   *
   * @param {V1} version - Version of the resource
   * @param {MessagePayload} payload - The instance payload
   * @param {sid} conversationSid -
   *          The unique ID of the Conversation for this message.
   * @param {sid} sid - A 34 character string that uniquely identifies this resource.
   */
  /* jshint ignore:end */
  MessageInstance = function MessageInstance(version, payload, conversationSid,
                                              sid) {
    this._version = version;
  
    // Marshaled Properties
    this.accountSid = payload.account_sid; // jshint ignore:line
    this.conversationSid = payload.conversation_sid; // jshint ignore:line
    this.sid = payload.sid; // jshint ignore:line
    this.index = deserialize.integer(payload.index); // jshint ignore:line
    this.author = payload.author; // jshint ignore:line
    this.body = payload.body; // jshint ignore:line
    this.media = payload.media; // jshint ignore:line
    this.attributes = payload.attributes; // jshint ignore:line
    this.participantSid = payload.participant_sid; // jshint ignore:line
    this.dateCreated = deserialize.iso8601DateTime(payload.date_created); // jshint ignore:line
    this.dateUpdated = deserialize.iso8601DateTime(payload.date_updated); // jshint ignore:line
    this.url = payload.url; // jshint ignore:line
    this.delivery = payload.delivery; // jshint ignore:line
    this.links = payload.links; // jshint ignore:line
  
    // Context
    this._context = undefined;
    this._solution = {conversationSid: conversationSid, sid: sid || this.sid, };
  };
  
  Object.defineProperty(MessageInstance.prototype,
    '_proxy', {
      get: function() {
        if (!this._context) {
          this._context = new MessageContext(
            this._version,
            this._solution.conversationSid,
            this._solution.sid
          );
        }
  
        return this._context;
      }
  });
  
  /* jshint ignore:start */
  /**
   * update a MessageInstance
   *
   * @function update
   * @memberof Twilio.Conversations.V1.ConversationContext.MessageInstance#
   *
   * @param {object} [opts] - Options for request
   * @param {string} [opts.author] -
   *          The channel specific identifier of the message's author.
   * @param {string} [opts.body] - The content of the message.
   * @param {Date} [opts.dateCreated] - The date that this resource was created.
   * @param {Date} [opts.dateUpdated] - The date that this resource was last updated.
   * @param {string} [opts.attributes] -
   *          A string metadata field you can use to store any data you wish.
   * @param {message.webhook_enabled_type} [opts.xTwilioWebhookEnabled] -
   *          The X-Twilio-Webhook-Enabled HTTP request header
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed MessageInstance
   */
  /* jshint ignore:end */
  MessageInstance.prototype.update = function update(opts, callback) {
    return this._proxy.update(opts, callback);
  };
  
  /* jshint ignore:start */
  /**
   * remove a MessageInstance
   *
   * @function remove
   * @memberof Twilio.Conversations.V1.ConversationContext.MessageInstance#
   *
   * @param {object} [opts] - Options for request
   * @param {message.webhook_enabled_type} [opts.xTwilioWebhookEnabled] -
   *          The X-Twilio-Webhook-Enabled HTTP request header
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed MessageInstance
   */
  /* jshint ignore:end */
  MessageInstance.prototype.remove = function remove(opts, callback) {
    return this._proxy.remove(opts, callback);
  };
  
  /* jshint ignore:start */
  /**
   * fetch a MessageInstance
   *
   * @function fetch
   * @memberof Twilio.Conversations.V1.ConversationContext.MessageInstance#
   *
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed MessageInstance
   */
  /* jshint ignore:end */
  MessageInstance.prototype.fetch = function fetch(callback) {
    return this._proxy.fetch(callback);
  };
  
  /* jshint ignore:start */
  /**
   * Access the deliveryReceipts
   *
   * @function deliveryReceipts
   * @memberof Twilio.Conversations.V1.ConversationContext.MessageInstance#
   *
   * @returns {Twilio.Conversations.V1.ConversationContext.MessageContext.DeliveryReceiptList}
   */
  /* jshint ignore:end */
  MessageInstance.prototype.deliveryReceipts = function deliveryReceipts() {
    return this._proxy.deliveryReceipts;
  };
  
  /* jshint ignore:start */
  /**
   * Provide a user-friendly representation
   *
   * @function toJSON
   * @memberof Twilio.Conversations.V1.ConversationContext.MessageInstance#
   *
   * @returns Object
   */
  /* jshint ignore:end */
  MessageInstance.prototype.toJSON = function toJSON() {
    let clone = {};
    _.forOwn(this, function(value, key) {
      if (!_.startsWith(key, '_') && ! _.isFunction(value)) {
        clone[key] = value;
      }
    });
    return clone;
  };
  
  MessageInstance.prototype[util.inspect.custom] = function inspect(depth,
      options) {
    return util.inspect(this.toJSON(), options);
  };
  
  
  /* jshint ignore:start */
  /**
   * Initialize the MessageContext
   *
   * PLEASE NOTE that this class contains beta products that are subject to change.
   * Use them with caution.
   *
   * @constructor Twilio.Conversations.V1.ConversationContext.MessageContext
   *
   * @property {Twilio.Conversations.V1.ConversationContext.MessageContext.DeliveryReceiptList} deliveryReceipts -
   *          deliveryReceipts resource
   *
   * @param {V1} version - Version of the resource
   * @param {sid_like} conversationSid -
   *          The unique ID of the Conversation for this message.
   * @param {sid} sid - A 34 character string that uniquely identifies this resource.
   */
  /* jshint ignore:end */
  MessageContext = function MessageContext(version, conversationSid, sid) {
    this._version = version;
  
    // Path Solution
    this._solution = {conversationSid: conversationSid, sid: sid, };
    this._uri = `/Conversations/${conversationSid}/Messages/${sid}`;
  
    // Dependents
    this._deliveryReceipts = undefined;
  };
  
  /* jshint ignore:start */
  /**
   * update a MessageInstance
   *
   * @function update
   * @memberof Twilio.Conversations.V1.ConversationContext.MessageContext#
   *
   * @param {object} [opts] - Options for request
   * @param {string} [opts.author] -
   *          The channel specific identifier of the message's author.
   * @param {string} [opts.body] - The content of the message.
   * @param {Date} [opts.dateCreated] - The date that this resource was created.
   * @param {Date} [opts.dateUpdated] - The date that this resource was last updated.
   * @param {string} [opts.attributes] -
   *          A string metadata field you can use to store any data you wish.
   * @param {message.webhook_enabled_type} [opts.xTwilioWebhookEnabled] -
   *          The X-Twilio-Webhook-Enabled HTTP request header
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed MessageInstance
   */
  /* jshint ignore:end */
  MessageContext.prototype.update = function update(opts, callback) {
    if (_.isFunction(opts)) {
      callback = opts;
      opts = {};
    }
    opts = opts || {};
  
    var deferred = Q.defer();
    var data = values.of({
      'Author': _.get(opts, 'author'),
      'Body': _.get(opts, 'body'),
      'DateCreated': serialize.iso8601DateTime(_.get(opts, 'dateCreated')),
      'DateUpdated': serialize.iso8601DateTime(_.get(opts, 'dateUpdated')),
      'Attributes': _.get(opts, 'attributes')
    });
    var headers = values.of({'X-Twilio-Webhook-Enabled': _.get(opts, 'xTwilioWebhookEnabled')});
  
    var promise = this._version.update({uri: this._uri, method: 'POST', data: data, headers: headers});
  
    promise = promise.then(function(payload) {
      deferred.resolve(new MessageInstance(
        this._version,
        payload,
        this._solution.conversationSid,
        this._solution.sid
      ));
    }.bind(this));
  
    promise.catch(function(error) {
      deferred.reject(error);
    });
  
    if (_.isFunction(callback)) {
      deferred.promise.nodeify(callback);
    }
  
    return deferred.promise;
  };
  
  /* jshint ignore:start */
  /**
   * remove a MessageInstance
   *
   * @function remove
   * @memberof Twilio.Conversations.V1.ConversationContext.MessageContext#
   *
   * @param {object} [opts] - Options for request
   * @param {message.webhook_enabled_type} [opts.xTwilioWebhookEnabled] -
   *          The X-Twilio-Webhook-Enabled HTTP request header
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed MessageInstance
   */
  /* jshint ignore:end */
  MessageContext.prototype.remove = function remove(opts, callback) {
    if (_.isFunction(opts)) {
      callback = opts;
      opts = {};
    }
    opts = opts || {};
  
    var deferred = Q.defer();
    var headers = values.of({'X-Twilio-Webhook-Enabled': _.get(opts, 'xTwilioWebhookEnabled')});
  
    var promise = this._version.remove({uri: this._uri, method: 'DELETE', headers: headers});
  
    promise = promise.then(function(payload) {
      deferred.resolve(payload);
    }.bind(this));
  
    promise.catch(function(error) {
      deferred.reject(error);
    });
  
    if (_.isFunction(callback)) {
      deferred.promise.nodeify(callback);
    }
  
    return deferred.promise;
  };
  
  /* jshint ignore:start */
  /**
   * fetch a MessageInstance
   *
   * @function fetch
   * @memberof Twilio.Conversations.V1.ConversationContext.MessageContext#
   *
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed MessageInstance
   */
  /* jshint ignore:end */
  MessageContext.prototype.fetch = function fetch(callback) {
    var deferred = Q.defer();
    var promise = this._version.fetch({uri: this._uri, method: 'GET'});
  
    promise = promise.then(function(payload) {
      deferred.resolve(new MessageInstance(
        this._version,
        payload,
        this._solution.conversationSid,
        this._solution.sid
      ));
    }.bind(this));
  
    promise.catch(function(error) {
      deferred.reject(error);
    });
  
    if (_.isFunction(callback)) {
      deferred.promise.nodeify(callback);
    }
  
    return deferred.promise;
  };
  
  Object.defineProperty(MessageContext.prototype,
    'deliveryReceipts', {
      get: function() {
        if (!this._deliveryReceipts) {
          this._deliveryReceipts = new DeliveryReceiptList(
            this._version,
            this._solution.conversationSid,
            this._solution.sid
          );
        }
        return this._deliveryReceipts;
      }
  });
  
  /* jshint ignore:start */
  /**
   * Provide a user-friendly representation
   *
   * @function toJSON
   * @memberof Twilio.Conversations.V1.ConversationContext.MessageContext#
   *
   * @returns Object
   */
  /* jshint ignore:end */
  MessageContext.prototype.toJSON = function toJSON() {
    return this._solution;
  };
  
  MessageContext.prototype[util.inspect.custom] = function inspect(depth, options)
      {
    return util.inspect(this.toJSON(), options);
  };
  
  module.exports = {
    MessageList: MessageList,
    MessagePage: MessagePage,
    MessageInstance: MessageInstance,
    MessageContext: MessageContext
  };
  