Split RelationRegistry::Builder into smaller methods
Split RelationRegistry::Builder into smaller methods

jeremyf/rom,dcarral/rom,dekz/rom,rom-rb/rom,endash/rom,vrish88/rom,pxlpnk/rom,cored/rom,rom-rb/rom,kwando/rom,denyago/rom,Snuff/rom,pdswan/rom,rom-rb/rom,pvcarrera/rom