add support for wait_for_ready #29
Description
Can we please add support for wait_for_ready https://github.com/grpc/grpc/blob/75a3e1bb4581c36779600909e07557d96c59e911/examples/python/wait_for_ready/wait_for_ready_example.py#L61
error:
TypeError: __call__() got an unexpected keyword argument 'wait_for_ready';