(self, field_name)
Clears the contents of a given field, or the field set inside a oneof
    group.  If the name neither refers to a defined field or oneof group,
    ValueError is raised.
Clears the contents of a given field, or the field set inside a oneof
    group.  If the name neither refers to a defined field or oneof group,
    ValueError is raised.
Clears the contents of a given field or the field set inside a oneof group . If the name neither refers to a defined field or oneof group ValueError is raised .
def ClearField(self, field_name):
    """Clears the contents of a given field, or the field set inside a oneof
    group.  If the name neither refers to a defined field or oneof group,
    ValueError is raised."""
    raise NotImplementedError
def ClearField ( self , field_name ) : raise NotImplementedError