get full image url

Controller.php

<?php
use noam148\imagemanager\models\ImageManager;
/**
 * Get the path for the given ImageManager_id record
 * @param int $ImageManager_id ImageManager record for which the path needs to be generated
 * @return null|string Full path is returned when image is found, null if no image could be found
 */
public static function getOriginalImagePath($ImageManager_id) {
    $return = null;
    $model = ImageManager::findOne($ImageManager_id);

    $return = \Yii::$app->imagemanager->getImagePath($model->id, $model->imageDetails['width'], $model->imageDetails['height'], "inset");
    return $return;
}