Use Indexers to use brackets, eg [i], syntax.
Keys now can be used as following:
var someVal = obj.SomeProperty[key];
obj.SomeProperty[key] = someNewVal;
And for multiple keys:
var someVal = obj.SomeProperty[(key1, key2)];
obj.SomeProperty[(key1, key2)] = someNewVal;
T8384
Reviewed-by: WooHyun Jung <wh0705.jung@samsung.com>
Differential Revision: https://phab.enlightenment.org/D10791