anchor.diff:  === Hiding Columns
   
   Columns can be hidden by removing them with [methodname]#removeColumn()#. You
  -can remove all columns with [methodname]#removeAllColumns()#. The removed columns
  +can remove all columns with [methodname]#removeAllColumn()#. The removed columns
   are only removed from the grid, not from the container data source.
   
   To restore a previously removed column, you can call [methodname]#addColumn()#
  
positive.code: [[components.grid.editing.validation]]
  === Handling Validation Errors
  
  The input fields are validated when the value is updated. The default
  error handler displays error indicators in the invalid fields, as well as the
  first error in the editor.
  
  
negative.code: === Multiple Selection
  
  In the multiple selection mode, a user can select multiple items by clicking on
  the checkboxes in the leftmost column.
  
  [[figure.components.grid.selection.multi]]
  .Multiple Selection in  [classname]#Grid#
  