text: //Checks if a string exists and is not empty. Used for parameters. 
  function isProvided(param) {    
      return param !== undefined && param.length > 0
  }
  
  function isSize(param) {
      return param == "small" || param == "medium" || param == "large" 
  }
  
  function isRice(param) {
      return param == "white" || param == "brown" || param == "fried" 
  }
  
  function isProtein(param) {
      return param == "chicken" || param == "chicken breast" || 
      param == "katsu" || param == "shrimp" || param == "bulgogi" || 
      param == "orange chicken" || param == "mongolian beef" || param == "broccoli beef"
  }
  
  
  function isBoolean(param) {
      return param == new Boolean(true) || param == "t" || param == "true" ||
              param == "y" || param == "yes" || param == "on" || param == "1" ||
              param == new Boolean(false) || param == "f" || param == "false" ||
              param == "n" || param == "no" || param == "off" || param == "0"
  }
  
  module.exports = { isProvided, isSize, isRice, isProtein, isBoolean }