+ /**
+ * Filter whether to update metadata of a specific type.
+ *
+ * The dynamic portion of the hook, $meta_type, refers to the meta
+ * object type (comment, post, or user). Returning a non-null value
+ * will effectively short-circuit the function.
+ *
+ * @since 3.1.0
+ *
+ * @param null|bool $check Whether to allow updating metadata for the given type.
+ * @param int $object_id Object ID.
+ * @param string $meta_key Meta key.
+ * @param mixed $meta_value Meta value. Must be serializable if non-scalar.
+ * @param mixed $prev_value Optional. If specified, only update existing
+ * metadata entries with the specified value.
+ * Otherwise, update all entries.
+ */