SysML provided/required DirectedFeature contracts for ProxyPorts SHOULD be satisfiable Feature-wise (including as subsets of Features) not necessarily just at the level of entire Blocks (types)!

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The SysML spec is clear on Property (StructuralFeature):
The SysML-1.6 spec is not clear on per-BehavioralFeature matching for Operations and Receptions
This constraint is spoiling the show, Webel is lobbying to have it changed: Because it is not consistent with the description of connection compatiblity for ProxyPort:
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