Project settings (please note carefully):

• The option show navigabilityis false for every Association end (all 6 of them)
  (inspection shows all 6 generated properties are non-navigable).
• Global project option enable dot notation for Associations is true.

Only some Comments have been added to this diagram as generated by the wizard. Because project option enable dot notation for Associations is on we can tell that the generated part properties are NOT owned by the Classifier DecomposeMe (because there are no dots showing at the association ends).

Image: