code: public static Copyright of(
  		final String author,
  		final Year year,
  		final URI license
  	) {
  		return new Copyright(author, year, license);
  	}
docs: Create a new {@code Copyright} object with the given data.
  
  @param author copyright holder (TopoSoft, Inc.)
  @param year year of copyright.
  @param license link to external file containing license text.
  @return a new {@code Copyright} object with the given data
  @throws NullPointerException if the {@code author} is {@code null}