public class CanvasPolylineArrowData {
public double arrow_width ;
public double arrow_length ;
public double arrow_tip_length ;
public double[] line_start ;
public double[] line_end ;
public double[] start_arrow_coords ;
public double[] end_arrow_coords ;
}

public double arrow_width ;
public double arrow_length ;
public double arrow_tip_length ;
public double[] line_start ;
public double[] line_end ;
public double[] start_arrow_coords ;
public double[] end_arrow_coords ;
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