This method computes the serialVersionUID of a BCEL JavaClass in the same way that the
java.io.ObjectStreamClass class computes it for a java.lang.Class.
Usually this method should generate bytecode as:
return jdoFieldNames.length + superClass.jdoGetManagedFieldCount();
but due to initializing issues [ENHANCER-58], we use constants instead, e.g.:
return +superClass.jdoGetManagedFieldCount();