code: def check_native_jsonfield_postgres_engine(app_configs=None, **kwargs):
  	
  	from . import settings as djstripe_settings
  
  	messages = []
  	error_msg = "DJSTRIPE_USE_NATIVE_JSONFIELD is not compatible with engine {engine} for database {name}"
  
  	if djstripe_settings.USE_NATIVE_JSONFIELD:
  		for db_name, db_config in settings.DATABASES.items():
  			# Hi there.
  			# You may be reading this because you are using Postgres, but
  			# dj-stripe is not detecting that correctly. For example, maybe you
  			# are using multiple databases with different engines, or you have
  			# your own backend. As long as you are certain you can support jsonb,
  			# you can use the SILENCED_SYSTEM_CHECKS setting to ignore this check.
  			engine = db_config.get("ENGINE", "")
  			if "postgresql" not in engine and "postgis" not in engine:
  				messages.append(
  					checks.Critical(
  						error_msg.format(name=repr(db_name), engine=repr(engine)),
  						hint="Switch to Postgres, or unset DJSTRIPE_USE_NATIVE_JSONFIELD",
  						id="djstripe.C005",
  					)
  				)
  
  	return messages
docs: Check that the DJSTRIPE_USE_NATIVE_JSONFIELD isn't set unless Postgres is in use.