Problem with child module about create-divi-extension HOT 3 CLOSED

/**
 * Filters the HTML attributes for the module's outer wrapper. The dynamic portion of the
 * filter name, '$slug', corresponds to the module's slug.
 *
 * @since 3.1
 *
 * @param string[]           $outer_wrapper_attrs
 * @param ET_Builder_Element $module_instance
 */
$outer_wrapper_attrs = apply_filters( "et_builder_module_{$slug}_outer_wrapper_attrs", $outer_wrapper_attrs, $this );

/**
 * Filters the HTML attributes for the module's inner wrapper. The dynamic portion of the
 * filter name, '$slug', corresponds to the module's slug.
 *
 * @since 3.1
 *
 * @param string[]           $inner_wrapper_attrs
 * @param ET_Builder_Element $module_instance
 */
$inner_wrapper_attrs = apply_filters( "et_builder_module_{$slug}_inner_wrapper_attrs", $inner_wrapper_attrs, $this );