code: public List<Type> methodGenericTypes() {
          return methodGenerics.isEmpty()
                  ? Collections.<Type>emptyList() : new ArrayList<Type>(methodGenerics.values());
      }
docs: {@code <T extends Serializable> T method();}.
  <pre>{@code context.method(A.getMethod('method')).methodGenericTypes() == [Class<Serializable>]}</pre>
  
  @return current method generics types