code: function(template) {
          if (typeof template === 'function') {
              template = template.call(null, Toolkit.bem, Toolkit.namespace);
          }
  
          return template + '';
      }
docs: Parse a value and convert it to a template string.
  If the template is a function, execute it and pass the `bem()` function,
  and the current namespace as arguments.
  
  @param {String|Function} template
  @returns {String}