Inherit the minimum size request. In particular, this should be used with %PANGO_WRAP_CHAR.
Try not to wrap the text. This mode is the closest to GTK3's behavior but can lead to a wide label leaving lots of empty space below the text.
Attempt to wrap at word boundaries. This is useful in particular when using %PANGO_WRAP_WORD_CHAR as the wrap mode.
Options for selecting a different wrap mode for natural size requests.
See for example the [property
Gtk
.Label:natural-wrap-mode] property.