Function args_have_ros_args 

pub fn args_have_ros_args<I, S>(args: I) -> bool
where
    I: IntoIterator<Item = S>,
    S: AsRef<str>,

Does args open a --ros-args scope at all?

No longer the refusal’s predicate — since the -r parse landed, a vector with --ros-args is parsed, and only what it cannot honour is refused (nros_node::ros_args::parse_ros_args). Kept because “will this argv be read?” is still a question a caller can ask before handing it over.

Exact match only. --ros-args-extra is not the flag, and a prefix match would claim an argument nano-ros never reads — pinned by a unit test.