def ToJsonString(self):
    return ','.join(self.paths)
Converts FieldMask to string according to proto3 JSON spec.
dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/net/proto2/python/internal/well_known_types.py/FieldMask.ToJsonString