Function type for determining whether the row pointed to by iter should be rendered as a separator. A common way to implement this is to have a boolean column in the model, whose values the GtkTreeViewRowSeparatorFunc returns.
TRUE if the row is a separator
Function type for determining whether the row pointed to by iter should be rendered as a separator. A common way to implement this is to have a boolean column in the model, whose values the GtkTreeViewRowSeparatorFunc returns.