text: /** An object where each cell on the grid has a key (its {@link CellId}), and the
  corresponding value at that key is an array with some values for that cell. These
  arrays do not have to be of the same length.
  @typedef {object} CellArrayObject
  */
  
  /** An object where each cell on the grid has a key (its {@link CellId}), and the
  corresponding value at that key is single property of that cell. 
  @typedef {object} CellObject
  */