copy_context

This is sometimes needed for cases where rows need to share alignments in one orientation but may be separately grouped in the opposing orientation.

For instance, `GtkIconView` creates all icons (rows) to have the same width and the cells theirin to have the same horizontal alignments. However each row of icons may have a separate collective height. `GtkIconView` uses this to request the heights of each row based on a context which was already used to request all the row widths that are to be displayed.

Parameters:

this	a `GtkCellArea`
context	the `GtkCellArea`Context to copy

Returns:

a newly created `GtkCellArea`Context copy of context.