partial fix for scrutinizer documentational issues
https://scrutinizer-ci.com/g/Onend/paypal-sdk-php/inspections/c71306cf-05c1-435c-8280-76c02fbe54ad/issues/?status=existing&selectedLabels%5B0%5D=7&orderField=path&order=asc
Merge branch 'master' of github.com:Onend/paypal-sdk-php