Macro cfg_find_map 

macro_rules! cfg_find_map {
    ($object:expr, $closure:expr) => { ... };
}

Applies a function and returns an entry where lambda(e) is not None.

Notes

• This returns at most one entry that satisfies the given condition, not necessarily the first one.
• closure must be a lambda function returning Option, e.g., |e| Some(e).