enum Operation {
SoBoolOperation::CLEAR
SoBoolOperation::SET
SoBoolOperation::A
SoBoolOperation::NOT_A
SoBoolOperation::B
SoBoolOperation::NOT_B
SoBoolOperation::A_OR_B
SoBoolOperation::NOT_A_OR_B
SoBoolOperation::A_OR_NOT_B
SoBoolOperation::NOT_A_OR_NOT_B
SoBoolOperation::A_AND_B
SoBoolOperation::NOT_A_AND_B
SoBoolOperation::A_AND_NOT_B
SoBoolOperation::NOT_A_AND_NOT_B
SoBoolOperation::A_EQUALS_B
SoBoolOperation::A_NOT_EQUALS_B
}