code: public static <T> List<Number> findIndexValues(T[] self, @ClosureParams(FirstParam.Component.class) Closure condition) {
          return findIndexValues(self, 0, condition);
      }
docs: Iterates over the elements of an Array and returns
  the index values of the items that match the condition specified in the closure.
  
  @param self      an Array
  @param condition the matching condition
  @return a list of numbers corresponding to the index values of all matched objects
  @since 2.5.0