As an alternative to composition Association "trees" consider instead using symbol resize to visually "bracket" composed items (can however be a bit fiddly).

Icon class
icon_class
far fa-sticky-note
icon_class_computed
far fa-sticky-note
Note kind
DISPLAY
STYLE
TIP
UML keywords
Association
Keywords
This is suggested here in part because of:
MagicDraw/Cameo tool support for Association composition "trees" is not good, and they end up being fiddly to maintain (and they can also cause issues for InformationFlows). Avoid them!
Relates to
Figure D.15 - Defining the Automotive Domain (Automotive Domain Breakdown)
Figure D.16 - Defining Structure of the Hybrid SUV System (Hybrid SUV Breakdown)
Figure D.23 - Elaborating Definition of Fuel Flow (Power Subsystem Fuel Flow Definition)
Figure D.26 - Defining Analyses for Hybrid SUV Engineering Development (Block Definition Diagram)
Figure D.34 - Defining Straight-Line Vehicle Dynamics Mathematical Constraints (Definition of Dynamics)
Figure 8-12 - Block diagram for the Wheel Package (WheelHubAssembly)
REFERENCE: A.5 Humidifier: Webel: Block overview
A.5 Humidifier: Scenario block overview BDDs: 96 to 102
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