image sources to include in a ‘srcset’ attribute.   
[ wp_calculate_image_sizes() ](https://developer.wordpress.org/reference/functions/wp_calculate_image_sizes/) ` wp-includes/media.php ` |  Creates a ‘sizes’ attribute value for an image.   
[ WP_REST_Request::get_parameter_order() ](https://developer.wordpress.org/reference/classes/wp_rest_request/get_parameter_order/) ` wp-includes/rest-api/class-wp-rest-request.php ` |  Retrieves the parameter priority order.   
[ WP_REST_Server::get_data_for_routes() ](https://developer.wordpress.org/reference/classes/wp_rest_server/get_data_for_routes/) ` wp-includes/rest-api/class-wp-rest-server.php ` |  Retrieves the publicly-visible data for routes.   
[ WP_REST_Server::dispatch() ](https://developer.wordpress.org/reference/classes/wp_rest_server/dispatch/) ` wp-includes/rest-api/class-wp-rest-server.php ` |  Matches the request to a callback and call it.   
[ WP_REST_Server::get_index() ](https://developer.wordpress.org/reference/classes/wp_rest_server/get_index/) ` wp-includes/rest-api/class-wp-rest-server.php ` |  Retrieves the site index.   
[ WP_REST_Server::get_namespace_index() ](https://developer.wordpress.org/reference/classes/wp_rest_server/get_namespace_index/) ` wp-includes/rest-api/class-wp-rest-server.php ` |  Retrieves the index for a namespace.   
[ WP_REST_Server::envelope_response() ](https://developer.wordpress.org/reference/classes/wp_rest_server/envelope_response/) ` wp-includes/rest-api/class-wp-rest-server.php ` |  Wraps the response in an envelope.   
[ WP_REST_Server::get_routes() ](https://developer.wordpress.org/reference/classes/wp_rest_server/get_routes/) ` wp-includes/rest-api/class-wp-rest-server.php ` |  Retrieves the route map.   
[ WP_REST_Server::serve_request() ](https://developer.wordpress.org/reference/classes/wp_rest_server/serve_request/) ` wp-includes/rest-api/class-wp-rest-server.php ` |  Handles serving a REST API request.   
[ WP_REST_Server::embed_links() ](https://developer.wordpress.org/reference/classes/wp_rest_server/embed_links/) ` wp-includes/rest-api/class-wp-rest-server.php ` |  Embeds the links from the data into the request.   
[ WP_REST_Server::check_authentication() ](https://developer.wordpress.org/reference/classes/wp_rest_server/check_authentication/) ` wp-includes/rest-api/class-wp-rest-server.php ` |  Checks the authentication headers if supplied.   
[ WP_oEmbed_Controller::get_item() ](https://developer.wordpress.org/reference/classes/wp_oembed_controller/get_item/) ` wp-includes/class-wp-oembed-controller.php ` |  Callback for the embed API endpoint.   
[ WP_oEmbed_Controller::register_routes() ](https://developer.wordpress.org/reference/classes/wp_oembed_controller/register_routes/) ` wp-includes/class-wp-oembed-controller.php ` |  Register the oEmbed REST API route.   
[ get_the_post_thumbnail_url() ](https://developer.wordpress.org/reference/functions/get_the_post_thumbnail_url/) ` wp-includes/post-thumbnail-template.php ` |  Returns the post thumbnail URL.   
[ wp_removable_query_args() ](https://developer.wordpress.org/reference/functions/wp_removable_query_args/) ` wp-includes/functions.php ` |  Returns an array of single-use query variable names that can be removed from a URL.   
[ wp_handle_comment_submission() ](https://developer.wordpress.org/reference/functions/wp_handle_comment_submission/) ` wp-includes/comment.php ` |  Handles the submission of a comment, usually posted to wp-comments-post.php via a comment form.   
[ wp_new_comment_notify_moderator() ](https://developer.wordpress.org/reference/functions/wp_new_comment_notify_moderator/) ` wp-includes/comment.php ` |  Sends a comment moderation notification to the comment moderator.   
[ wp_new_comment_notify_postauthor() ](https://developer.wordpress.org/reference/functions/wp_new_comment_notify_postauthor/) ` wp-includes/comment.php ` |  Sends a notification of a new comment to the post author.   
[ get_preview_post_link() ](https://developer.wordpress.org