code: func (f *Fpdf) ArcTo(x, y, rx, ry, degRotate, degStart, degEnd float64) {
  	f.arc(x, y, rx, ry, degRotate, degStart, degEnd, "", true)
  }
docs: // ArcTo draws an elliptical arc centered at point (x, y). rx and ry specify its
  // horizontal and vertical radii. If the start of the arc is not at
  // the current position, a connecting line will be drawn.
  //
  // degRotate specifies the angle that the arc will be rotated. degStart and
  // degEnd specify the starting and ending angle of the arc. All angles are
  // specified in degrees and measured counter-clockwise from the 3 o'clock
  // position.
  //
  // styleStr can be "F" for filled, "D" for outlined only, or "DF" or "FD" for
  // outlined and filled. An empty string will be replaced with "D". Drawing uses
  // the current draw color, line width, and cap style centered on the arc's
  // path. Filling uses the current fill color.
  //
  // The MoveTo() example demonstrates this method.