MvvmCross.Binding.Bindings.MvxFullBinding.CreateSourceBinding C# (CSharp) Method

        private void CreateSourceBinding(object source)
        {
            this._dataContext = source;
            this._sourceStep = this.SourceStepFactory.Create(this._bindingDescription.Source);
            this._sourceStep.TargetType = this._targetBinding.TargetType;
            this._sourceStep.DataContext = source;

            if (this.NeedToObserveSourceChanges)
            {
                this._sourceBindingOnChanged = (sender, args) =>
                    {
                        //Capture the cancel token first
                        var cancel = _cancelSource.Token;
                        //GetValue can now be executed in a worker thread. Is it the responsibility of the caller to switch threads, or ours ?
                        //As the source is the viewmodel, i suppose it is the responsibility of the caller.
                        var value = this._sourceStep.GetValue();
                        this.UpdateTargetFromSource(value, cancel);
                    };
                this._sourceStep.Changed += this._sourceBindingOnChanged;
            }

            this.UpdateTargetOnBind();
        }