class Magick::RVG::Utility::GraphicContext

def text_anchor(anchor)
  anchor = anchor.to_sym
  anchor_enum = TEXT_ANCHOR.fetch(anchor, Magick::StartAnchor)
  @gc.text_anchor(anchor_enum)
  align = ANCHOR_TO_ALIGN.fetch(anchor, Magick::LeftAlign)
  @shadow[-1].align = align
  @text_attrs.text_anchor = anchor
  nil
end