(self, field_name)
Checks if a certain field is set for the message, or if any field inside
    a oneof group is set.  Note that if the field_name is not defined in the
    message descriptor, ValueError will be raised.
Checks if a certain field is set for the message, or if any field inside
    a oneof group is set.  Note that if the field_name is not defined in the
    message descriptor, ValueError will be raised.
Checks if a certain field is set for the message or if any field inside a oneof group is set . Note that if the field_name is not defined in the message descriptor ValueError will be raised .
def HasField(self, field_name):
    """Checks if a certain field is set for the message, or if any field inside
    a oneof group is set.  Note that if the field_name is not defined in the
    message descriptor, ValueError will be raised."""
    raise NotImplementedError
def HasField ( self , field_name ) : raise NotImplementedError