Function to_writer_with_options 

pub fn to_writer_with_options<W: Write, T: Serialize>(
    out: &mut W,
    value: &T,
    options: SerializerOptions,
) -> Result<(), Error>

Serialize a value to a writer using SerializerOptions.

Use this to tweak indentation or provide a custom anchor name generator.

Example: 4-space indentation.

use serde::Serialize;

#[derive(Serialize)]
struct Foo { a: i32 }

let mut buf = String::new();
let opts = serde_saphyr::SerializerOptions { indent_step: 4, anchor_generator: None };
serde_saphyr::to_writer_with_options(&mut buf, &Foo { a: 7 }, opts).unwrap();
assert!(buf.contains("a: 7"));

Example: custom anchor names when using Rc/Arc wrappers.

use serde::Serialize;
use std::rc::Rc;

#[derive(Serialize)]
struct Node { name: String }

let shared = Rc::new(Node { name: "n".into() });
let mut buf = String::new();
let opts = serde_saphyr::SerializerOptions { indent_step: 2, anchor_generator: Some(|id| format!("id{id}")) };
serde_saphyr::to_writer_with_options(&mut buf, &serde_saphyr::RcAnchor(shared), opts).unwrap();
assert!(buf.contains("&id1") || buf.contains("&id0"));