@Override
            protected void kTo(Output output, int fieldNumber, Object key,
                    boolean repeated) throws IOException
            {
                inlineK.writeTo(output, fieldNumber, key, repeated);
            }
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