@Override
            protected Field<T> copy(IdStrategy strategy)
            {
                return createMapInlineKPolymorphicV(number, name, f, messageFactory, 
                        inlineK, clazzV, strategy);
            }
Static utility for creating runtime {@link java.util.Map} fields.

@author David Yu
@created Jan 21, 2011
protostuff-runtime/src/main/java/io/protostuff/runtime/RuntimeMapFieldFactory.java