presto-parser/src/main/java/io/prestosql/sql/tree/WindowFrame.java/WindowFrame/equals
class WindowFrame:    @Override
    public boolean equals(Object obj)
    {
        if (this == obj) {
            return true;
        }
        if ((obj == null) || (getClass() != obj.getClass())) {
            return false;
        }
        WindowFrame o = (WindowFrame) obj;
        return Objects.equals(type, o.type) &&
                Objects.equals(start, o.start) &&
                Objects.equals(end, o.end);
    }