class Magick::RVG::Use

def initialize(element, x=0, y=0, width=nil, height=nil)

a width and height for referenced RVG objects.
the group. The +width+ and +height+ arguments specify
can be used to specify an additional translation for
The +x+ and +y+ arguments
RVG::UseConstructors#use method.
In a container, Use objects are created indirectly via the 
def initialize(element, x=0, y=0, width=nil, height=nil)
    super()
    # If the element is not a group, defs, symbol, or rvg,
    # wrap a group around it so it can get a transform and
    # possibly a new viewport.
    if ! element.respond_to?(:ref)
        @element = Group.new
        @element << element.deep_copy
    else
        @element = element.deep_copy
    end
    @element.ref(x, y, width, height)
end