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 = element.deep_copy
  else
    @element = Group.new
    @element << element.deep_copy
  end
  @element.ref(x, y, width, height)
end