By moving anchor=north before this umlcd style in the class, interface, abstractclass, and object classes, you increase the flexibility of the package, as you can set the anchor of the node in the optional argument to the environment, e.g.
\begin{class}[anchor=east]{foo}{x,y}
This makes positioning of diagram elements easier, as described in the TeX.SX post linked to above.
Based on https://tex.stackexchange.com/questions/396431/is-there-any-method-to-create-uml-using-latex-without-giving-x-y-co-ordinate
By moving
anchor=north
beforethis umlcd style
in theclass
,interface
,abstractclass
, andobject
classes, you increase the flexibility of the package, as you can set the anchor of the node in the optional argument to the environment, e.g.This makes positioning of diagram elements easier, as described in the TeX.SX post linked to above.