gos1-b2.js

let counterLimit;
function setCounterLimit(){
  counterLimit=10;
}

function validateLimit(){
  if(currentValue>counterLimit){
    return false;
  }
  return true;
}
.
.
.
// 100 or 200 line after
function specialCaseValidate(){
  // i am setting the couterlimit to 20 for validate the special customer
  counterLimit=20;
  if (validateLimit()){
      // some logic
  }
  // resetting counter limit to old state
  counterLimit=10;
}