There is a need for parametrize custom field usage definition and specify parameters. Proposition: ``` %field_name(param1=value1 some_param2=some value here some_param3=value) ``` It will enable to implement: https://github.com/athlan/wordpress-custom-fields-permalink-plugin/issues/27 and will be next enhancement to: https://github.com/athlan/wordpress-custom-fields-permalink-plugin/issues/28
