public function clear( $args, $assoc_args ) {
		/** @var \WP_Embed $wp_embed */
		global $wp_embed;

		$post_id = $args[0];

		$post_metas = get_post_custom_keys( $post_id );

		if ( $post_metas ) {
			$post_metas = array_filter(
				$post_metas,
				function ( $v ) {
					return '_oembed_' === substr( $v, 0, 8 );
				}
			);
		}

		if ( empty( $post_metas ) ) {
			WP_CLI::error( 'No cache to clear!' );
		}

		$wp_embed->delete_oembed_caches( $post_id );

		WP_CLI::success( 'Cleared oEmbed cache.' );
	}