Kernel#is_a? should check against included modules as well
Kernel#is_a? should check against included modules as well

castwide/opal,bbatsov/opal,jgaskins/opal,opal/opal,fazibear/opal,gabrielrios/opal,Mogztter/opal,domgetter/opal,fazibear/opal,wied03/opal,Mogztter/opal,kachick/opal,merongivian/opal,catprintlabs/opal,jannishuebl/opal,Ajedi32/opal,kachick/opal,c42engineering/opal,suyesh/opal,Ajedi32/opal,suyesh/opal,suyesh/opal,gausie/opal,jannishuebl/opal,Flikofbluelight747/opal,kachick/opal,castwide/opal,gausie/opal,fazibear/opal,iliabylich/opal,jgaskins/opal,opal/opal,Mogztter/opal,wied03/opal,Mogztter/opal,jgaskins/opal,Flikofbluelight747/opal,merongivian/opal,iliabylich/opal,opal/opal,gabrielrios/opal,catprintlabs/opal,gabrielrios/opal,kachick/opal,Flikofbluelight747/opal,iliabylich/opal,wied03/opal,opal/opal,bbatsov/opal,domgetter/opal,bbatsov/opal,c42engineering/opal,gausie/opal,merongivian/opal,jannishuebl/opal,Ajedi32/opal,castwide/opal,c42engineering/opal,catprintlabs/opal