% --- start of displayed preamble in the book --- input metauml % --- end of displayed preamble in the book --- defaultfont:="ptmr8r"; warningcheck:=0; beginfig(1) Class.A("A")()(); Class.B("B")()(); B.sw=A.ne+(30,10); drawObjects(A,B); z=A.se + (30,-10); link(transition) (pathCut(A,B)(A.c--z--B.c)); endfig; end;