function getValidOperation() {
let strPrompt = "Enter the resize operation:";
let strDefaultValue = defaultOperation;
let validValues = ["Shrink", "Grow"];
let boolShowListInPrompt = true;
let boolIsCaseSensitive = false;
return qxInputs.getValidInputFromList(validValues, strPrompt, strDefaultValue, boolShowListInPrompt, boolIsCaseSensitive);
}