@eagleoutice/flowr - v2.13.14
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    ExclusiveCallProps: readonly (readonly [(...), (...)])[] = ...

    Which CallProp bits rule each other out, as [bit, everything stating it forbids]. A definition that carries the left bit must carry none of the right ones; a test checks the DefaultBuiltinConfig (and any configured built-ins) against this. Every other pair of bits combines freely.