src/Configuration/ConfigManager.php
private function doProcessConfig($backendConfig): array
    {
        foreach ($this->configPasses as $configPass) {
            $backendConfig = $configPass->process($backendConfig);
        }

        return $backendConfig;
    }
private function doProcessConfig($backendConfig): array
    {
        foreach ($this->configPasses as $configPass) {
            $backendConfig = $configPass->process($backendConfig);
        }

        return $backendConfig;
    }
It processes the given backend configuration to generate the fully
processed configuration used in the application.

@param array $backendConfig

@return array