code: public static InvocationHandlerAdapter toField(String name) {
          return toField(name, FieldLocator.ForClassHierarchy.Factory.INSTANCE);
      }
docs: Creates an implementation for any {@link java.lang.reflect.InvocationHandler} that delegates
  all method interceptions to a field with the given name. This field has to be of a subtype of invocation
  handler and needs to be set before any invocations are intercepted. Otherwise, a {@link java.lang.NullPointerException}
  will be thrown.
  
  @param name The name of the field.
  @return An implementation that delegates all method interceptions to an instance field of the given name.