pub fn range_to_sql<F, G>( lower: F, upper: G, buf: &mut BytesMut, ) -> Result<(), Box<dyn Error + Sync + Send>>where F: FnOnce(&mut BytesMut) -> Result<RangeBound<IsNull>, Box<dyn Error + Sync + Send>>, G: FnOnce(&mut BytesMut) -> Result<RangeBound<IsNull>, Box<dyn Error + Sync + Send>>,
Serializes a range value.