Function osm_is_area::relation

pub fn relation<X>(tags: &[(&str, &str)], members: &[X]) -> bool where
    X: PartialEq, 

Returns true if the given relation is an area.

A relation is an area when it has a tag “type” with value “multipolygon”.

use osm_is_area;

let tags = vec![
    (r"type", r"multipolygon")
];
let members = vec![1, 3, 2, 1];

let is_area = osm_is_area::relation(&tags, &members);
assert_eq!(true, is_area);