'Verifies if the entity is a member of the parent in the fetcher
:param entity_fetcher: The fetcher for the entity type
:param entity: The entity to look for as a member in the entity fetcher
:return: boolean'

def _is_member(self, entity_fetcher, entity):

    members = entity_fetcher.get()
    for member in members:
        if (member.id == entity.id):
            return True
    return False
