class Magick::RVG::TextBase

def tspan(text, x = nil, y = nil)

position.
If x and y are omitted the text starts at the current text
Create a new text chunk. Each chunk can have its own initial position and styles. 
def tspan(text, x = nil, y = nil)
  tspan = Tspan.new(text, x, y)
  tspan.parent = self
  @tspans << tspan
  tspan
end