code: public static Collection beanMap(String property, Collection c, boolean includeNull) {
          return beanMap(property, c.iterator(), includeNull);
      }
docs: Map dynamically using a bean property name.
  
  @param property    the name of a bean property
  @param c           an Collection of objects
  @param includeNull true to include null results in the response
  
  @return collection
  
  @throws ClassCastException if there is an error invoking the method on any object.