code: public static Schema superSetOf(String newName, Schema schema, Field... newFields) {
  		List<Field> newSchema = new ArrayList<Field>();
  		newSchema.addAll(schema.getFields());
  		for(Field newField: newFields) {
  			newSchema.add(newField);
  		}
  		return new Schema(newName, newSchema);		
  	}
docs: Creates a superset of the input Schema, taking all the Fields in the input schema
  and adding some new ones. The new fields are fully specified in a Field class.
  The name of the schema is also specified as a parameter.