module Magick::RVG::StructureConstructors

def g(&block)

methods within the associated block.
Define grouped elements by calling RVG::Embellishable
the contained object itself.
contained within, unless overridden by an inner container or
transforms specified on this object will be used by objects
Group _container_ object. The styles and
This method constructs a new

Defines a group. 
def g(&block)
  group = Group.new(&block)
  @content << group
  group
end

def rvg(cols, rows, x = 0, y = 0, &block)

the contained object itself.
contained within, unless overridden by an inner container or
transforms specified on this object will be used by objects
_container_ method. Styles and
upper-left corner within the containing viewport. This is a
Establishes a new viewport. [x, y] is the coordinate of the 
def rvg(cols, rows, x = 0, y = 0, &block)
  rvg = Magick::RVG.new(cols, rows, &block)
  begin
    x = Float(x)
    y = Float(y)
  rescue ArgumentError
    args = [cols, rows, x, y]
    raise ArgumentError, "at least one argument is not convertable to Float (got #{args.map(&:class).join(', ')})"
  end
  rvg.corner(x, y)
  @content << rvg
  rvg
end