is there a way to disable PDN for a specific macros? I've tried: • not including it in the pdn configuration, but then it complains that there is no matching grid specification • including a spec that only has blockages and no straps or connections. I even tried

power_pins ""

but then it complains that not all power/ground ports were found:

Warning: No pins in the LEF view of switches\[0\].elem.es.impl  marked for use as power
Warning: Attempting to match power pin by name (using top-level port name) for cell: switches\[0\].elem.es.impl
Warning: No pins in the LEF view of switches\[0\].elem.es.impl  marked for use as ground
Warning: Attempting to match ground pin by name (using top-level port name) for cell: switches\[0\].elem.es.impl
Warning: not all power pins found for cell: switches\[0\].elem.es.impl
Exiting... Use --ignore-missing-pins to ignore such errors