class_docstr: A pen that creates a CGPath
  
  Parameters
  - path: an optional CGPath to add to
  - xform: an optional CGAffineTransform to apply to the path
code: def _lineTo(self, pt):
      x, y = pt
      CGPathAddLineToPoint(self.path, self.xform, x, y)
  
file_path: catboost/contrib/python/fonttools/fontTools/pens/quartzPen.py
imports: from fontTools.pens.basePen import BasePen
  from Quartz.CoreGraphics import CGPathCreateMutable, CGPathMoveToPoint
  from Quartz.CoreGraphics import CGPathAddLineToPoint, CGPathAddCurveToPoint
  from Quartz.CoreGraphics import CGPathAddQuadCurveToPoint, CGPathCloseSubpath
label_desc: Use image node_id 3 for calling the QuartzPen obj's underlying member method code with example usage: obj._lineTo(pt) without return types