code: public static Method getAccessibleMethod(Class<?> clazz, String methodName, Class<?> paramType) {
          Class<?>[] paramTypes = { paramType };
          return getAccessibleMethod(clazz, methodName, paramTypes);
      }
docs: <p>Return an accessible method (that is, one that can be invoked via
  reflection) with given name and a single parameter.  If no such method
  can be found, return {@code null}.
  Basically, a convenience wrapper that constructs a {@code Class}
  array for you.</p>
  
  @param clazz get method from this class
  @param methodName get method with this name
  @param paramType taking this type of parameter
  @return the accessible method