presto-main/src/main/java/io/prestosql/operator/scalar/annotations/ScalarFromAnnotationsParser.java/ScalarHeaderAndMethods/ScalarHeaderAndMethods
class ScalarHeaderAndMethods:        public ScalarHeaderAndMethods(ScalarImplementationHeader header, Set<Method> methods)
        {
            this.header = requireNonNull(header);
            this.methods = requireNonNull(methods);
        }