Anima2D 'keyframe.tangentMode' is obsolete

Anima2D script KeyframeUtility.cs is reporting that ‘keyframe.tangentMode’ is obsolete.
How do we fix that? Isn’t anima2d supposed to be managed by unity anyway?

namespace Anima2D
{
	public class KeyframeUtility
	{
		public enum TangentMode
		{
			Editable = 0,
			Smooth = 1,
			Linear = 2,
			Stepped = Linear | Smooth,
		}

		public static TangentMode GetKeyTangentMode(int tangentMode, int leftRight)
		{
			if (leftRight == 0)
			{
				return (TangentMode) ((tangentMode & 6) >> 1);
			}else{
				return (TangentMode) ((tangentMode & 24) >> 3);
			}
		}

		public static void SetKeyTangentMode(ref Keyframe keyframe, int leftRight, TangentMode mode)
		{
			int tangentMode = keyframe.tangentMode;

			if (leftRight == 0)
			{
				tangentMode &= -7;
				tangentMode |= (int) mode << 1;
			}
			else
			{
				tangentMode &= -25;
				tangentMode |= (int) mode << 3;
			}

			keyframe.tangentMode = tangentMode;
		}
	}
}

Having the very same issue and the api of anima 2d is apparently obsolete is there any way to fix it since the api auto updater is junk and fails to fix a number of issues. If anyone knows any reasonable way to fix this set of api issues plz share because it would help a large number of people using this tool thnx.

Just a tip, because this question still has no answers: The function “SetKeyTangentMode” is not called by Anima2D itself. Therefore you can just remove it if you don’t call it yourself.