LoadModule loads the url module.

Parse parses rawurl into a URL structure.

PathEscape escapes the string so it can be safely placed inside a URL path segment, replacing special characters (including /) with %XX sequences as needed.

PathUnescape does the inverse transformation of PathEscape, converting each 3-byte encoded substring of the form "%AB" into the hex-decoded byte 0xAB.

QueryEscape escapes the string so it can be safely placed inside a URL query.

QueryUnescape does the inverse transformation of QueryEscape, converting each 3-byte encoded substring of the form "%AB" into the hex-decoded byte 0xAB.

ModuleName defines the expected name for this Module when used in starlark's load() function, eg: load('io/ioutil', 'json').

URL represents a parsed URL (technically, a URI reference).