# see the file NOTICE in the root directory of the PlomRogue source package.
-import server.thingproliferation_helpers
+from server.config.world_data import symbols_passable
-field_spreadable = server.thingproliferation_helpers.field_spreadable
+field_spreadable = lambda x, y: x in symbols_passable
thingprol_plugin_conditions = lambda x: True
thingprol_plugin_post_create_hook = lambda x: None