def init_id_index_map(self):
    if (not self.is_parent):
        return
    self.id_index_map = {}
    for descriptor in self.descriptors:
        id = descriptor[ID_COLUMN_NAME]
        self.id_index_map[id] = self.descriptors.index(descriptor)
def init_id_index_map(self):
    if (not self.is_parent):
        return
    self.id_index_map = {}
    for descriptor in self.descriptors:
        id = descriptor[ID_COLUMN_NAME]
        self.id_index_map[id] = self.descriptors.index(descriptor)