docs: function getValueCount(values, property) {
  
          var arr = {};
  
          property = property ? property : '';
  
          if (!values) {
              grunt.log.writeln(app.chalkWarn('no ' + property + ' defined in your css'));
              return arr;
          }
  
          values.forEach(function (v) {
              v = v.replace(/['"]/g, '');
  
              if (arr.hasOwnProperty(v)) {
                  arr[v] = arr[v] + 1;
              } else {
                  arr[v] = 1;
              }
          });
  
          return arr;
      }