Function extendr_api::functions::global_function

pub fn global_function<K: Into<Robj>>(key: K) -> Option<Robj>

Get a global function from global_env() and ancestors.

use extendr_api::prelude::*;
test! {
    let ls = global_function(sym!(ls)).ok_or("ls failed")?;
    assert_eq!(ls.is_function(), true);
}