code: function normalizeOptions(optionValue) {
      if (typeof optionValue === "string") {
          return {
              arrays: optionValue,
              objects: optionValue,
              imports: optionValue,
              exports: optionValue,
  
              // For backward compatibility, always ignore functions.
              functions: "ignore"
          };
      }
      if (typeof optionValue === "object" && optionValue !== null) {
          return {
              arrays: optionValue.arrays || DEFAULT_OPTIONS.arrays,
              objects: optionValue.objects || DEFAULT_OPTIONS.objects,
              imports: optionValue.imports || DEFAULT_OPTIONS.imports,
              exports: optionValue.exports || DEFAULT_OPTIONS.exports,
              functions: optionValue.functions || DEFAULT_OPTIONS.functions
          };
      }
  
      return DEFAULT_OPTIONS;
  }
docs: Normalize option value.
  
  @param {string|Object|undefined} optionValue - The 1st option value to normalize.
  @returns {Object} The normalized option value.