WordPress at a glance
filter is not described

rest_themes_collection_params filter-hook . WP 5.0.0

Filter collection parameters for the themes controller.

Usage

add_filter( 'rest_themes_collection_params', 'filter_function_name_7741' );
function filter_function_name_7741( $query_params ){
	// filter...

	return $query_params;
}
$query_params(array)
JSON Schema-formatted collection parameters.

Where the hook is called

WP_REST_Themes_Controller::get_collection_params()
wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php 211
return apply_filters( 'rest_themes_collection_params', $query_params );

Where the hook is used (in WP core)

Does not used.