gtk:tree-view-level-indentation (object)

object -- a gtk:tree-view widget
indentation -- an integer for the amount, in pixels, of extra indentation

The accessor for the level-indentation slot of the gtk:tree-view class gets or sets the amount, in pixels, of extra indentation for child levels in the tree view in addition to the default indentation.

The value should be specified in pixels, a value of 0 disables this feature and in this case only the default indentation will be used. This does not have any visible effects for lists. The gtk:tree-view implementation is deprecated since 4.10. Please do not use it in newly written code.