src/ExtraDataProcessor.php
public function addExtraData(array $extraData = [])
    {
        foreach ($extraData as $key => $data) {
            $this->extraData[$key] = $data;
        }
    }
public function addExtraData(array $extraData = [])
    {
        foreach ($extraData as $key => $data) {
            $this->extraData[$key] = $data;
        }
    }
Adds more extra data into the processor.

Overwrites existing data without warning.

@param array $extraData
@return void