rousnay / lighthouse

				// save sub fields

				if( !empty($sub_fields) ) {

					$keys = array_keys($sub_fields);

					foreach( $keys as $key ) {

						$sub_field = acf_extract_var($sub_fields, $key);

						$sub_field['parent'] = $field['ID'];

						$sub_field['parent_layout'] = $layout_key;

						_migrate_field_500( $sub_field );

					}

					// foreach

				}

				// if

			// set choices

			if( !empty($posts) ) {

				foreach( array_keys($posts) as $i ) {

					// vars

					$post = acf_extract_var( $posts, $i );

					if( is_object($post) ) {

						// append to choices

						$field['choices'][ $post->ID ] = $this->get_post_title( $post, $field );

					} else {

						// append to choices

						$field['choices'][ $post ] = $post;

					}

				}

			}

		}

					// validate sub fields

					if( !empty($sub_fields) ) {

						// loop over sub fields

						foreach( array_keys($sub_fields) as $j ) {

							// extract sub field

							$sub_field = acf_extract_var( $sub_fields, $j );

							// attributes

							$sub_field['parent'] = $field['key'];

							$sub_field['parent_layout'] = $layout['key'];

							// append to extra

							$extra[] = $sub_field;

						}

					}

					// append to layout