code: public static Method getAccessibleMethod(
              Class<?> clazz,
              String methodName,
              Class<?> parameterType) {
  
          Class<?>[] parameterTypes = {parameterType};
          return getAccessibleMethod(clazz, methodName, parameterTypes);
      }
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</code>.
  Basically, a convenience wrapper that constructs a <code>Class</code>
  array for you.</p>
  
  @param clazz get method from this class
  @param methodName get method with this name
  @param parameterType taking this type of parameter
  @return The accessible method