'Invoke the PUT method on a resource.
@param relpath: Optional. A relative path to this resource\'s path.
@param params: Key-value data.
@param data: Optional. Body of the request.
@param contenttype: Optional.
@return: A dictionary of the JSON result.'

def put(self, relpath=None, params=None, data=None, headers=None):

    return self.invoke('PUT', relpath, params, data, headers)
