Method name is written only if there is one op

https://github.com/Interactions-HSG/wot-td-java/blob/53c9c453d9410067f2bae298ab15e4b5d2f13cee/src/main/java/ch/unisg/ics/interactions/wot/td/io/TDGraphWriter.java#L192-L201

Why does it create ambiguity to add the method name in case there is more than 1 operation types, since the method name is actually provided by the user (i.e. it is not added as a default value)? I am probably missing something.