marko/taglibs/layout/use-tag.js

module.exports = function render(input, context) {
    var content = {};

    if (input.getContent) {
        input.getContent({
            handlePutTag: function (putTag) {
                content[putTag.into] = putTag;
            }
        });
    }

    var viewModel = input['*'] || {};
    viewModel.layoutContent = content;
    input.template.render(viewModel, context);
};