code: function concatInterpolatedContent(content) {
  		Expression.parseInterpolated(content, {
  			ontext: function(text) {
  				concatText(text);
  			},
  			onexpression: function(expr) {
  				if (expr.textOnly || (config.virtual === false)) {
  					concatText(expr);
  				} else {
  					nodes.push(expr);
  				}
  			}
  		});
  	}
docs: DRY parse