   buildUri: ->
     uri = @watcher.getQuery().cloneUri()
     uri.setPath(@origUri.getPath())
-    uri.setParameterValue '_accept', @getType()
     for k in @implicitUriParams.getKeys() when not uri.getParameterValue(k)?
       uri.setParameterValue k, @implicitUriParams.getValues(k)
     uri.toString()

  @DATA:
    FILE: 'fileName'
    TYPE: 'type'

  ###*
    @enum {string}
  ###
  @LOOKUP:
    'csv': 'text/csv'
    'xlsx': 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
    'xml': 'text/xml'
    'json': 'application/json'
    'yaml': 'application/x-yaml'
    'picle': 'application/python-pickle'
    'pdf': 'application/pdf'
    'zip': 'application/zip'

  ###*
    @param {Object} params


  ###*
    @protected
    @return {string|undefined}
  ###
  getExtension: ->
