PrimitiveSampler : Support cancellation
PrimitiveSampler : Support cancellation

hradec/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,boberfly/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,andrewkaufman/gaffer,boberfly/gaffer,lucienfostier/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,ImageEngine/gaffer,johnhaddon/gaffer,GafferHQ/gaffer,hradec/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,hradec/gaffer,boberfly/gaffer,boberfly/gaffer,andrewkaufman/gaffer,lucienfostier/gaffer,lucienfostier/gaffer,hradec/gaffer,hradec/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer