Use `const_defined?` so that it only checks withing the scope of URI.
Use `const_defined?` so that it only checks withing the scope of URI.

liamseanbrady/rack,davydovanton/rack,keepcosmos/rack,davidcelis/rack,wildjcrt/rack,wildjcrt/rack,laplaceliu/rack,Codeman655/rack,fabianrbz/rack,gioele/rack,jeremyf/rack,akihiro17/rack,chneukirchen/rack,trexnix/rack,davidcelis/rack,AMekss/rack,ganmacs/rack,Comcast/rack,ganmacs/rack,deepj/rack,shaneog/rack,imtayadeway/rack,gfvcastro/rack,eins78/rack,evanphx/rack,keithduncan/rack,stepri/rack,rwz/rack,shaneog/rack,Codeman655/rack,akihiro17/rack,stepri/rack,fabianrbz/rack,sigmavirus24/rack,maclover7/rack,Eric-Guo/rack,gfvcastro/rack,supzann3/rack,deepj/rack,AMekss/rack,rwz/rack,Comcast/rack,krainboltgreene/lack,wjordan/rack,keithduncan/rack,evanphx/rack,imtayadeway/rack,arronmabrey/rack,arronmabrey/rack,rkh/rack,laplaceliu/rack,ngpestelos/rack,jackxxu/rack,jeremyf/rack,rkh/rack,ngpestelos/rack,keithduncan/rack,zjsxwc/rack,maclover7/rack,liamseanbrady/rack,chneukirchen/rack,davidcelis/rack,eins78/rack,davydovanton/rack,akihiro17/rack,tricknotes/rack,eavgerinos/rack,supzann3/rack,eins78/rack,AMekss/rack,fabianrbz/rack,ktheory/rack,rwz/rack,zjsxwc/rack,tylergannon/rack,laplaceliu/rack,wildjcrt/rack,supzann3/rack,Eric-Guo/rack,gfvcastro/rack,liamseanbrady/rack,zjsxwc/rack,nmk/rack,ganmacs/rack,trexnix/rack,gioele/rack,jeremyf/rack,trexnix/rack,tylergannon/rack,tylergannon/rack,jackxxu/rack,maclover7/rack,chneukirchen/rack,eavgerinos/rack,evanphx/rack,arronmabrey/rack,Comcast/rack,shaneog/rack,keepcosmos/rack,ngpestelos/rack,paulrogers/rack,ktheory/rack,Codeman655/rack,keepcosmos/rack,sigmavirus24/rack,eavgerinos/rack,imtayadeway/rack,nmk/rack,jackxxu/rack,sigmavirus24/rack,davydovanton/rack,deepj/rack,nmk/rack,wjordan/rack,Eric-Guo/rack,tricknotes/rack,jhodder/rack,gioele/rack,wjordan/rack,stepri/rack