The ServiceLib.convertToURLEncoded() system
function converts a string into a Universe Resource Locator (URL),
which identifies a web page or represents the resource that will be
accessed by a REST service. The function is useful if you wish to
use a URL that includes spaces or other characters that are not valid
in the URL. For example, if your URL includes query parameters and
the value of a parameter includes a space, the function returns a
valid URL, with a plus sign (+) in place of the space.