UnityEditor.AudioMixerDrawUtils.GetAlpha C# (CSharp) Method

        public static float GetAlpha()
        {
            return (!GUI.enabled ? 0.7f : 1f);
        }

 public static void DrawLine(float x1, float y1, float x2, float y2, Color c)
 {
     if (Event.current.type == EventType.Repaint)
     {
         HandleUtility.ApplyWireMaterial();
         GL.Begin(1);
         GL.Color(new Color(c.r, c.g, c.b, c.a * AudioMixerDrawUtils.GetAlpha()));
         AudioMixerDrawUtils.Vertex(x1, y1);
         AudioMixerDrawUtils.Vertex(x2, y2);
         GL.End();
     }
 }