Divides the vertical space in the gtk.Layout being iterated over
between the lines in the layout, and returns the space belonging to
the current line. A line's range includes the line's logical
extents, plus half of the spacing above and below the line, if
Layout.setSpacing has been called to set layout spacing.
The Y positions are in layout coordinates (origin at top left of the
entire layout).
Divides the vertical space in the gtk.Layout being iterated over between the lines in the layout, and returns the space belonging to the current line. A line's range includes the line's logical extents, plus half of the spacing above and below the line, if Layout.setSpacing has been called to set layout spacing. The Y positions are in layout coordinates (origin at top left of the entire layout).