Message sent by the client for the CreateCustomClass method.
Required. The parent resource where this custom class will
be created. Format:
Speech-to-Text supports three locations: ``global``, ``us``
(US North America), and ``eu`` (Europe). If you are calling
the ``speech.googleapis.com`` endpoint, use the ``global``
location. To specify a region, use a `regional
Required. The ID to use for the custom class,
which will become the final component of the
custom class' resource name.
This value should restrict to letters, numbers,
and hyphens, with the first character a letter,
the last a letter or a number, and be 4-63