The request is a dictionary with the following entries:
-``kind`` (string, required)
+``what`` (string, required)
An :ref:`item type <item-types>`.
``fields`` (list of strings, required)
List of names of fields to return. Example::
The request is a dictionary with the following entries:
-``kind`` (string, required)
+``what`` (string, required)
An :ref:`item type <item-types>`.
``fields`` (list of strings, optional)
List of names of fields to return. If not set, all fields are