@Override
            protected void vTo(Output output, int fieldNumber, Object val,
                    boolean repeated) throws IOException
            {
                if (!clazzV.isAssignableFrom(val.getClass()))
                {
                    throw new RuntimeException(f.getDeclaringClass().getName() + 
                            "::" + f.getName() + " - " + val.getClass().getName() + 
                            " is not assignable to " + clazzV.getName());
                }
                output.writeObject(fieldNumber, val,
                        strategy.POLYMORPHIC_POJO_ELEMENT_SCHEMA, 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