Constant MIN_ELBOW_VELOCITY 

pub const MIN_ELBOW_VELOCITY: f64 = _; // -2.1440030000000001f64

Minimum elbow velocity, i.e. -MAX_ELBOW_VELOCITY.

libfranka 0.9.2 has no kMinElbowVelocity; its limitRate(max_velocity, ...) overload is symmetric (src/control_loop.cpp:254). 0.21.2 spells the negation out as a constant and the crate follows it, so the v5 module defines the same derived value.