DataGrid: how to live sort/should we be able to get the column size?

[krassowski]

I would like to sort my data grid while preserving column sizes. Currently:

• The built-in JSONModel does not offer any way of modifying the data once it is constructed. The _data is private rather than protected so I cannot subclass without using @ts-ignore which is a bad practice.
• I can hot-swap the model which with a new JSONModel, which works but:
  • does not preserve column sizes and there is no public DataGrid method to retrieve column sizes (there is one to set column sizes)
  • has a potential performance penalty

1. Is there an obvious way I missed?
2. Should the datagrid support sorting columns by default?
3. Should we make _data protected in JSONModel and friends?
4. Should we DataGrid expose a way to get current column sizes?

[krassowski]

I was wrong, there is in fact DataGrid.columnSize method.