gtk:tree-view-append-column (view column)

view -- a gtk:tree-view widget
column -- a gtk:tree-view-column object to add

The integer with the number of columns in view after appending.

Appends column to the list of columns in the tree view. If view has fixed height mode enabled, then column must have its sizing property set to be the :fixed value. The gtk:tree-view implementation is deprecated since 4.10. Please do not use it in newly written code.