code: protected boolean isMatchingZX(Op opA, Op opB) {
          if (opA.x() == opB.x() && opA.z() == opB.z() && opA.x() == opB.z())
              return true;
  
          return false;
      }
docs: This method checks, if opA and opB are sharing the same operands
  
  @param opA
  @param opB
  @return