code: func opsiteOP(op1, op2 string) bool {
  	switch {
  	case op1 == ast.GE || op1 == ast.GT:
  		return op2 == ast.LT || op2 == ast.LE
  	case op1 == ast.LE || op1 == ast.LT:
  		return op2 == ast.GT || op2 == ast.GE
  	}
  	return false
  }
docs: // opsiteOP the opsite direction of a compare operation, used in ruleColumnOPConst.