private void TwoBoneIk(
GameObject skeletonObject, Bone bone1,
Vector3 targetPosition, Vector3 elbowTargetOffset
)
{
var bone1Object = skeletonObject.FindDescendant(bone1.Name);
var bone2 = bone1.Children[0];
var bone2Object = skeletonObject.FindDescendant(bone2.Name);
var targetElbowPosition = bone1Object.transform.position + elbowTargetOffset;
GameObjectExtensions.TwoBoneIk(
bone1Object.transform, bone1.Length,
bone2Object.transform, bone2.Length,
targetPosition, targetElbowPosition, true
);
}