getting a pango tabarray for a specific line of text

["Nick Gravgaard" <me nickgravgaard com>]

Hi all,

My application has non-uniform tabs of different sizes on different
lines. Does anyone know how I should go about getting a pango tabarray
for a specific line of text in a textbuffer?

Someone suggested I should use separate layout objects, so I presume
there must be some way of getting a layout object for a specific line.
Is this the right approach, and if so, how do I do it?

Thanks in advance,
Nick