getArea
Fetches the GtkCellArea
this @context was created by.
This is generally unneeded by layouting widgets; however, it is important for the context implementation itself to fetch information about the area it is being used for.
For instance at GtkCellAreaContextClass.allocate()
time it’s important to know details about any cell spacing that the GtkCellArea
is configured with in order to compute a proper allocation.
Return
the GtkCellArea
this context was created by.