2b0a8505_Tobago_Core_2_0_0_alpha_1_API___Remarks
[Parent] PROPORTIONAL [Child] any combination of AUTO or PIXEL but no PROPORTIONAL [Okay?] potentially wrong [Remarks] 
No automatic matching: too little space: scroll bar too much space: elements will be spread.
UIGridLayout (Tobago Core 2.0.0-alpha-1 API)