Managing garbage collector lifetime in Rust: how to implement garbage collection for long-lived objects

Hello, colleagues! I'm new to Rust and trying to understand memory management. I come from Java, where the garbage collector solves all memory problems, and now I'm having difficulty getting used to the ownership and lifetime system. I need to implement a data structure where objects can live long and reference each other. For example, a graph with cyclic references. In Java, I would just create `HashMap>` and forget about it. In Rust, the compiler complains about borrows and lifetimes. I'm trying to do something like: ```rust struct Node { id: u32, children: Vec<&Node>, } fn main() { let mut nodes = Vec::new(); let node1 = Node { id: 1, children: vec![] }; let node2 = Node { id: 2, children: vec![] }; node1.children.push(&node2); node2.children.push(&node1); ```