code: public static <T> Constructor<T> getConstructorIfAvailable(Class<T> clazz, Class<?>... paramTypes) {
  		Assert.notNull(clazz, "Class must not be null");
  		try {
  			return clazz.getConstructor(paramTypes);
  		}
  		catch (NoSuchMethodException ex) {
  			return null;
  		}
  	}
docs: Determine whether the given class has a public constructor with the given signature,
  and return it if available (else return {@code null}).
  <p>Essentially translates {@code NoSuchMethodException} to {@code null}.
  @param clazz the clazz to analyze
  @param paramTypes the parameter types of the method
  @return the constructor, or {@code null} if not found
  @see Class#getConstructor