public function import($modelName, $defaultValues = [], $updateMultipleModel = false, $queryConfigs = [])
	{
		$isSuccessful = true;

		$sheetData = $this->arrayFromExcel;
		$this->header = array_shift($sheetData);

		foreach ($sheetData as $record) {

			if ($updateMultipleModel) {

				$parentId = $this->getParentId($queryConfigs['parentModel'], $queryConfigs['parentKey'],
				$record, $modelName, $defaultValues);

				$childModel = new $queryConfigs['childModel'];
				foreach ($queryConfigs['childModelArray'] as $key=>$value) {
					if (!is_array($value)) {
						$childModel->$value = $this->getCellValue($value, $childModel, $record, $key, false);
					} else {
						$childModel->$value['attribute'] = $this->getCellValue($value, $childModel, $record, $key, false);
					}
				}

				$childModel->$queryConfigs['childForeignKey'] = $parentId;
				$childModel->save();
			} else {

				$isSuccessful = $this->createModel($modelName, $defaultValues, $record);
			}
		}
		return $isSuccessful;
	}