private void SetWeight(float value, bool createNewChannel = true)
        {
            if (boneIndex == -1)
            {
                return;
            }

            Debug.Assert(selection != null);

            for (int i = 0; i < spriteMeshData.vertices.Count; ++i)
            {
                if (selection.Count == 0 && emptySelectionEditsAll ||
                    selection.Count > 0 && selection.IsSelected(i))
                {
                    EditableBoneWeight editableBoneWeight = spriteMeshData.vertices[i].editableBoneWeight;

                    int channel = editableBoneWeight.GetChannelFromBoneIndex(boneIndex);

                    if (channel == -1)
                    {
                        if (createNewChannel)
                        {
                            editableBoneWeight.AddChannel(new BoneWeightData(boneIndex, 0f), true);
                            channel = editableBoneWeight.GetChannelFromBoneIndex(boneIndex);
                        }
                        else
                        {
                            continue;
                        }
                    }

                    BoneWeightData data = editableBoneWeight.GetBoneWeightData(channel);
                    data.weight += value;

                    editableBoneWeight.SetBoneWeightData(channel, data);

                    if (editableBoneWeight.GetWeightSum() > 1f)
                    {
                        editableBoneWeight.CompensateOtherChannels(channel);
                    }

                    editableBoneWeight.FilterChannels(0f);
                }
            }
        }