Hello Ricky Low,
Please have a look following difference between get_object_reference and _xmlid_lookup method.
@api.model
def get_object_reference(self, module, xml_id):
"""Returns (model, res_id) corresponding to a given module and xml_id (cached) or raise ValueError if not found"""
above mothod take 2 arguments(module and xml_id ) and return tuple (model, res_id)
# NEW V8 API
@api.model
@tools.ormcache('xmlid')
def _xmlid_lookup(self, xmlid):
"""Low level xmlid lookup
Return (id, res_model, res_id) or raise ValueError if not found
"""
above mothod take only 1 arguments(xml_id ) and return tuple (id, model, res_id)
So As per latest code you have to pass only one argument which is xml_id to _xmlid_lookup method
_xmlid_lookup(xml)
Please have a look following example
action_id = self.env['ir.model.data']._xmlid_lookup('base_setup.action_general_configuration')[2]
Thanks & Regards,

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