docs: function getScopeValue(scope, field) {
          if (!scope || !field) { return null; }
  
          var fieldParts = field.split('.');
          var pntr = scope;
  
          _.each(fieldParts, function (fieldPart) {
              if (pntr) {
                  pntr = pntr[fieldPart];
              }
          });
  
          return pntr;
      }