[metapost] metauml and "btex ... etex"

[Steven Woody]

it seemed that metauml does not support using btex ... etex to specify
an object's name.

for example, compiling the following simple code will yied an error
something like:
"unknown  string A.name"

----------------------
verbatimtex
%&latex
\documentclass{article}
\begin{document}
etex

input metauml;
beginfig(1);
Class.A( btex $j$ etex )()();
A.nw = ( 0, 0 );
drawObject( A );
endfig;
end
-----------------------

is there a solution or that is what metauml really can not do? thanks.

-- 
woody

then sun rose thinly from the sea and the old man could see the other
boats, low on the water and well in toward the shore, spread out
across the current.