code: function matrixCase(data, options) {
                  var row = data.length;
                  var col = data[0].length;
                  if (options.size[0] === undefined)
                      options.size = [options.size, options.size, options.size, options.size];
                  throw new Error('matrix not supported yet, sorry');
              }
docs: Case when the entry is a matrix
  @param data
  @param options
  @returns {Array}