Struct CallbackGroup 

pub struct CallbackGroup { /* private fields */ }

A first-class callback group — a name-only token (rclcpp/rclrs shape).

Created via [NodeCtx::create_callback_group]. Passed to the _in entity-create variants (create_timer_in, create_subscription_in, create_publisher_in) to label entities with a group name.

The group is just a name — the actual SchedContext binding is seeded at boot by Executor::bind_group_sched (from system.toml group_tiers, phase 273 W2) and resolved at entity-registration time by apply_node_default_sched (phase 273 W1). No concurrency type (Mutually- Exclusive vs Reentrant) is stored here — that is RFC-0047 OQ1 follow-up.

Implementations

impl CallbackGroup

pub fn name(&self) -> &str

The group name (e.g. "ctrl", "telem").