httpservices/src/main/java/ucar/httpservices/Escape.java
public static String unescapeURLQuery(String ce)
    {
        try {
            ce = unescapeString(ce);
        } catch (Exception e) {
            ce = null;
        }
        return ce;
    }
public static String unescapeURLQuery(String ce)
    {
        try {
            ce = unescapeString(ce);
        } catch (Exception e) {
            ce = null;
        }
        return ce;
    }
Define the DEFINITIVE URL constraint expression unescape function.

@param ce The expression to unescape.
@return The unescaped expression.