[DUG] Firemonkey stringgrid question

[John Bird]

What is the best practice way to in Berlin Firemonkey havea custom layout and appearance for stringgrid cell?
I am wondering if stringgrid is not the best option for what I am trying to do – I want to customise a cell (2 or 3 labels in each, with different sizes and colours).
Similar to what Alistair Christie does in the Firemonkey Period table example with a Listbox.   There the way is to create a ListBoxItem, and apply the layout style to it.
https://www.youtube.com/watch?v=gEVb-iDHyhY
Listbox has rows but it is a less general control,  I would prefer to use a stringgrid over a listbox,  unless there are reasons to avoid it in Firemonkey, especially if going cross platform.
question - What is the object to use to assign layout to for a stringgrid cell in 10.1 Berlin?
Note I came across a couple of warnings about changes to grids in latest versions:
http://docwiki.embarcadero.com/RADStudio/Berlin/en/Changes_to_FireMonkey_Grid_Controls_in_Berlin
also
a previous example from Raize for earlier version of Firemonkey
http://www.raize.com/Articles/FmxStringGridCellFonts.asp
(excerpt)“
Unfortunately, the TColumn.CellControlByRow method was moved from the public section to protected in XE4. Therefore, in order to access this, we need to create a little helper class.

type
  TColumnAccess = class( TColumn )
  end;
Unfortunately helper classes look to not be an option in Berlin.
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