Allows authors to restrict access to blocks by user roles. This plugin is meant to be lightweight, limited in scope, while maintaining extensibility. If you need a hook, please reach out! Developer API User Block Visibility is meant to be extensible. For example, use the filter ubv_built_in_user_roles to restrict the built-in roles that are available. To create custom restriction options, use ubv_additional_roles and the built-in WordPress filter render_block. To restrict access to this functionality, use ubv_do_enqueue_sidebar.