Retrieves a particular line from a
[integer] the index of a line, which must be between 0 and
Use the faster
pangoLayoutGetLineReadonly if you do not plan
to modify the contents of the line (glyphs, glyph widths, etc.).
PangoLayoutLine] the requested
NULL if the
index is out of range. This layout line can
be ref'ed and retained, but will become invalid
if changes are made to the
Derived by RGtkGen from GTK+ documentation
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