def get_heads(self):
        heads = []
        for script in self._revision_map.values():
            if script and script.is_head:
                heads.append(script.revision)
        return heads
Return all "head" revisions as strings.
dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/alembic/script.py/ScriptDirectory.get_heads