Function join_qname 

pub fn join_qname(prefix: Option<&str>, local_name: &str) -> String

Joins a prefix and local name into a qualified name.

Examples

use fastxml::namespace::join_qname;

assert_eq!(join_qname(Some("gml"), "name"), "gml:name");
assert_eq!(join_qname(None, "Building"), "Building");