def abs.has_scheme
import bend-net-url@0.4.0.0/url.bend as Urlimport Base
509# §3.1: a ":" before any "/", "?" or "#" with a valid scheme name before it.
510def abs.has_scheme(+pre: String, colon: Bool) -> Bool:
511 Bool.and(colon, Bool.and(Bool.not(String.is_empty(pre)), scheme.ok(pre)))