public function processImportedSheets(array $data, array $globals) : array {
		$result = [
			'success' => false,
			'error' => [],
			'data' => []
		];
		// process globals
		$globals_final = [];
		$ignore_columns = [];
		if ($this->collection_object->primary_model->tenant) {
			$globals_final[$this->collection_object->primary_model->tenant_column] = $globals[$this->collection_object->primary_model->tenant_column];
			$ignore_columns[$this->collection_object->primary_model->tenant_column] = $this->collection_object->primary_model->tenant_column;
		}
		if ($this->collection_object->primary_model->module) {
			$globals_final[$this->collection_object->primary_model->module_column] = $globals[$this->collection_object->primary_model->module_column];
			$ignore_columns[$this->collection_object->primary_model->module_column] = $this->collection_object->primary_model->module_column;
		}
		// find main sheet
		$main_sheet_data = $data[$this->collection['name']] ?? $data['Main Sheet'] ?? [];
		unset($data[$this->collection['name']], $data['Main Sheet']);
		if (empty($main_sheet_data)) {
			$result['error'][] = \Object\Content\Messages::NO_ROWS_FOUND;
			return $result;
		}
		// loop though header rows
		foreach ($main_sheet_data as $k => $v) {
			$v = array_merge_hard($v, $globals_final);
			// details
			if (!empty($this->collection['details'])) {
				foreach ($this->collection['details'] as $k2 => $v2) {
					$v[$k2] = [];
					if (empty($data[$v2['name']])) continue;
					// go through data
					foreach ($data[$v2['name']] as $k3 => $v3) {
						// map child to parent
						$found = true;
						foreach ($v2['map'] as $k4 => $v4) {
							// important to add new items to ignore columns array
							if (isset($ignore_columns[$k4])) {
								$ignore_columns[$v4] = $v4;
								continue;
							}
							// compare
							if ($v3[$v4] != $v[$k4]) $found = false;
						}
						// if found
						if ($found) {
							// todo process subdetails
							$v[$k2][] = $v3;
							unset($data[$v2['name']][$k3]);
						}
					}
				}
			}
			$result['data'][$k] = $v;
			unset($main_sheet_data[$k]);
		}
		$result['success'] = true;
		return $result;
	}