dist/famous-flex.js
function _contextPrev() {

        // Get the previous node from the sequence
        if (!this._contextState.prevSequence) {
            return undefined;
        }
        if (!this._context.reverse) {
            this._contextState.prevSequence = this._contextState.prevSequence.getPrevious();
            if (!this._contextState.prevSequence) {
                return undefined;
            }
        }
        var renderNode = this._contextState.prevSequence.get();
        if (!renderNode) {
            this._contextState.prevSequence = undefined;
            return undefined;
        }
        var prevSequence = this._contextState.prevSequence;
        if (this._context.reverse) {
            this._contextState.prevSequence = this._contextState.prevSequence.getPrevious();
        }
        if (this._contextState.lastRenderNode === renderNode) {
          throw 'ViewSequence is corrupted, should never contain the same renderNode twice, index: ' + prevSequence.getIndex();
        }
        this._contextState.lastRenderNode = renderNode;
        return {
            renderNode: renderNode,
            viewSequence: prevSequence,
            prev: true,
            index: --this._contextState.prevGetIndex
        };
    }
function _contextPrev() {

        // Get the previous node from the sequence
        if (!this._contextState.prevSequence) {
            return undefined;
        }
        if (!this._context.reverse) {
            this._contextState.prevSequence = this._contextState.prevSequence.getPrevious();
            if (!this._contextState.prevSequence) {
                return undefined;
            }
        }
        var renderNode = this._contextState.prevSequence.get();
        if (!renderNode) {
            this._contextState.prevSequence = undefined;
            return undefined;
        }
        var prevSequence = this._contextState.prevSequence;
        if (this._context.reverse) {
            this._contextState.prevSequence = this._contextState.prevSequence.getPrevious();
        }
        if (this._contextState.lastRenderNode === renderNode) {
          throw 'ViewSequence is corrupted, should never contain the same renderNode twice, index: ' + prevSequence.getIndex();
        }
        this._contextState.lastRenderNode = renderNode;
        return {
            renderNode: renderNode,
            viewSequence: prevSequence,
            prev: true,
            index: --this._contextState.prevGetIndex
        };
    }
Get the previous render-node