error: variable does not need to be mutable
   --> src/builder_state.rs:566:13
    |
566 |         let mut leaf = Leaf::from_quorum_proposal(&quorum_proposal);
    |             ----^^^^
    |             |
    |             help: remove this `mut`

error: variable does not need to be mutable
   --> src/service.rs:618:9
    |
618 |     let mut leaf = Leaf::from_quorum_proposal(&qc_proposal.data);
    |         ----^^^^
    |         |
    |         help: remove this `mut`
    |
    = note: `-D unused-mut` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(unused_mut)]`

error: unused variable: `instance_state`
   --> src/service.rs:610:5
    |
610 |     instance_state: &Types::InstanceState,
    |     ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instance_state`
    |
    = note: `-D unused-variables` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(unused_variables)]`