parser_name now is optional
parser_name now is optional


Former-commit-id: b81abd7acd179d3798bfa30a7aa5862f8013a0cf [formerly 17a81639baaf9f4dbfa43e7a5ad774b6a62578d7] [formerly 82d32ac271adfcf5f54f8c136777b065ffb3cd3d]
Former-commit-id: fd7c55dd16c4cd45364549c7c5e5b96cd8aa3035
Former-commit-id: f422f77ec4b7cdd2fa227299c6866b8d4ac568e2
DEIB-GECO/PyGMQL,DEIB-GECO/PyGMQL