src/Core/Configuration/LocalConfigReader.php
public static function initializeAPIEntityRules($xmlObj, $ippConfig)
    {
        $rules=CoreConstants::getQuickBooksOnlineAPIEntityRules();
        LocalConfigReader::initOperationControlList($ippConfig, $rules);
        $specialConfig = LocalConfigReader::populateJsonOnlyEntities($xmlObj);
        if (is_array($specialConfig) && ($ippConfig->OpControlList instanceof OperationControlList)) {
            $ippConfig->OpControlList->appendRules($specialConfig);
        }
    }
public static function initializeAPIEntityRules($xmlObj, $ippConfig)
    {
        $rules=CoreConstants::getQuickBooksOnlineAPIEntityRules();
        LocalConfigReader::initOperationControlList($ippConfig, $rules);
        $specialConfig = LocalConfigReader::populateJsonOnlyEntities($xmlObj);
        if (is_array($specialConfig) && ($ippConfig->OpControlList instanceof OperationControlList)) {
            $ippConfig->OpControlList->appendRules($specialConfig);
        }
    }
Initializes API Entity Rules

@param IppConfiguration $ippConfig
@param \SimpleXMLElement $xmlObj