WP_Media_List_Table::column_parent

			$time      = get_post_timestamp( $post );
			$time_diff = time() - $time;

			if ( $time && $time_diff > 0 && $time_diff < DAY_IN_SECONDS ) {
				/* translators: %s: Human-readable time difference. */
				$h_time = sprintf( __( '%s ago' ), human_time_diff( $time ) );
			} else {
				$h_time = get_the_time( __( 'Y/m/d' ), $post );
			}
		}

		echo $h_time;
	}

	/**
	 * Handles the parent column output.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_Post $post The current WP_Post object.
	 */
	public function column_parent( $post ) {
		$user_can_edit = current_user_can( 'edit_post', $post->ID );

		if ( $post->post_parent > 0 ) {
			$parent = get_post( $post->post_parent );
		} else {
			$parent = false;
		}

		if ( $parent ) {
			$title       = _draft_or_post_title( $post->post_parent );
			$parent_type = get_post_type_object( $parent->post_type );

			if ( $parent_type && $parent_type->show_ui && current_user_can( 'edit_post', $post->post_parent ) ) {
				?>
				<strong><a href="<?php echo get_edit_post_link( $post->post_parent ); ?>">
					<?php echo $title; ?></a></strong>
								<?php
			} elseif ( $parent_type && current_user_can( 'read_post', $post->post_parent ) ) {
				?>
				<strong><?php echo $title; ?></strong>
									<?php
			} else {
				_e( '(Private post)' );
			}

			if ( $user_can_edit ) :
				$detach_url = add_query_arg(
					array(
						'parent_post_id' => $post->post_parent,
						'media[]'        => $post->ID,
						'_wpnonce'       => wp_create_nonce( 'bulk-' . $this->_args['plural'] ),
					),
					'upload.php'
				);
				printf(
					'<br /><a href="%s" class="hide-if-no-js detach-from-parent" aria-label="%s">%s</a>',
					$detach_url,