presto-main/src/main/java/io/prestosql/operator/WindowFunctionDefinition.java/WindowFunctionDefinition/window
class WindowFunctionDefinition:    public static WindowFunctionDefinition window(WindowFunctionSupplier functionSupplier, Type type, FrameInfo frameInfo, boolean ignoreNulls, List<Integer> inputs)
    {
        return new WindowFunctionDefinition(functionSupplier, type, frameInfo, ignoreNulls, inputs);
    }