Gravity Flow Status Column with Step Time

functions.php

<?php
add_filter( 'gravityflow_columns_status_table', 'custom_column_titles', 10, 3 );
function custom_column_titles( $columns, $args, $table ) {

	$columns['last_updated'] = 'Last Updated';
	return $columns;
}

add_filter( 'gravityflow_field_value_status_table', 'custom_column_field_values', 10, 4 );
function custom_column_field_values( $value, $form_id, $column_name, $entry ) {

	if ( $column_name == 'last_updated' ) {
		$duration = time() - $entry['workflow_timestamp'];
		$value = gravity_flow()->format_duration( $duration );
	}

	return $value;
}
?>