How can I create a Functional interface implementation for Fields?

Consider a field weight in class Animal. I want to be able to create a getter and setter functional interface objects for manipulating this field.

class Animal {
  int weight;
}

My current approach is similar to one used for methods:

public static Supplier getter(Object obj, Class<?> cls, Field f) throws Exception {
  boolean isstatic = Modifier.isStatic(f.getModifiers());
  MethodType sSig = MethodType.methodType(f.getType());
  Class<?> dCls = Supplier.class;
  MethodType dSig = MethodType.methodType(Object.class);
  String dMthd = "get";
  MethodType dType = isstatic? MethodType.methodType(dCls) : MethodType.methodType(dCls, cls);
  MethodHandles.Lookup lookup = MethodHandles.lookup();
  MethodHandle fctry = LambdaMetafactory.metafactory(lookup, dMthd, dType, dSig, lookup.unreflectGetter(f), sSig).getTarget();
  fctry = !isstatic && obj!=null? fctry.bindTo(obj) : fctry;
  return (Supplier)fctry.invoke();
}

But this gives the following error:

java.lang.invoke.LambdaConversionException: Unsupported MethodHandle kind: getField x.Animal.weight:()int