"LaTeXML::Common::Glue" - representation of glue, skips, stretchy dimensions; extends
LaTeXML::Common::Dimension.
Exportedfunctions
"$glue = Glue($spec);"
"$glue = Glue($sp,$plus,$pfill,$minus,$mfill);"
Creates a Glue object. $spec can be a string in the form that TeX recognizes (number units optional
plus and minus parts). Alternatively, the dimension, plus and minus parts can be given separately as
scaled points (fixpoint), while $pfill and $mfill are 0 (when the $plus or $minus part is in
scaledpoints) or 1,2,3 for fil, fill or filll, respectively.