public Map<String, List<String>> getParameters() {
        return parameters;
    }
Returns an unmodifiable Map of all values of all HTTP parameters on the
request, where each Map key is a parameter name. Each Map value is an
unmodifiable List of all values provided for the associated parameter and
will contain at least one value. Parameter names are case-sensitive, and
the returned map will perform lookups in a case-sensitive manner.

@return
    An unmodifiable Map of all values of all HTTP parameters on the
    request.
guacamole-ext/src/main/java/org/apache/guacamole/net/RequestDetails.java