Method metadata

packages/forms/signals/src/api/types.ts:489–489

* Reads a metadata value from the field. * @param key The metadata key to read.

(key: MetadataKey<M, any, any>)

   * @param key The metadata key to read.
   */
  metadata<M>(key: MetadataKey<M, any, any>): M | undefined;

  /**
   * Checks whether a metadata value exists on the field.