text: // TypedError class which other typed errors subclass from.
  class TypedError extends Error {
  
      constructor (message) {
          super();
  
          if (Error.hasOwnProperty('captureStackTrace'))
              Error.captureStackTrace(this, this.constructor);
          else
              Object.defineProperty(this, 'stack', {
                  value: (new Error()).stack
              });
  
          Object.defineProperty(this, 'message', {
              value: message
          });
      }
  
      get name () {
          return this.constructor.name;
      }
  
  }
  
  export class StreamingError extends TypedError {}
  export class NotFoundError extends TypedError {}
  export class MethodError extends TypedError {}
  export class NotAcceptableError extends TypedError {}
  export class UnsupportedError extends TypedError {}