DSE-BusBandwidthOpt: Use integers (ids) to access signal sizes
If a map with signal entries (or any other EMF object) is used in the functional getter, serialization fails since the serialization of the EMF framework is orthogonal to the Java serialization mechanisms. Consequently, we may only use types in the functional getters that are serializable by Java itself.
Issue-Ref: 4010 Issue-Url: https://af3-developer.fortiss.org/issues/4010 Signed-off-by: Alexander Diewald diewald@fortiss.org