code: func CairoErrorUnderlinePath(cr *cairo.Context, x, y, width, height float64) {
  	C.pango_cairo_error_underline_path(cairo_context(cr), C.double(x), C.double(y), C.double(width), C.double(height))
  }
docs: //void pango_cairo_error_underline_path (cairo_t       *cr,
  //				       double         x,
  //				       double         y,
  //				       double         width,
  //				       double         height);