find_caption()
returns a LaTeX2range object
for any caption
text, with an attribute extra
holding the range of
associated macros and whitespace.
drop_caption()
returns the items
with
captions dropped as a LaTeX2 object. It has an attribute
named idx
that is the idx
argument with corresponding
elements dropped.
path_to_caption()
returns a path
containing the location of the first caption
block within items
. It has an attribute extra
containing a LaTeX2range object for the
associated macros and whitespace.