presto-main/src/main/java/io/prestosql/operator/ParametricImplementationsGroup.java/ParametricImplementationsGroup/of
class ParametricImplementationsGroup:    public static <T extends ParametricImplementation> ParametricImplementationsGroup<T> of(T... implementations)
    {
        ParametricImplementationsGroup.Builder<T> builder = builder();
        for (T implementation : implementations) {
            builder.addImplementation(implementation);
        }
        return builder.build();
    }