ProtocolProperty
Generated from the engine's own definition: compute-engine's symbol, which we neither extend nor document by hand. No examples yet — the crosswalk is the reason it has a page.
Read (or write) a protocol PROPERTY through a NAMED protocol — the lowering of the qualified field form `person.(Nameable.name)` (protocols design P6, amending the D16 field grammar). The first two operands name the protocol and the property; the third is the receiver. A fourth operand makes it a property STORE — the qualified write `person.(Nameable.name) = v` — which invokes the `set` accessor against the receiver, discards what it returns, and evaluates to the value assigned; a receiver that is not an object is `immutable-value-assignment`. Dispatch is dynamic and restricted to the named protocol: the most specific conformance implementation for the runtime type of the receiver is invoked.
ProtocolProperty(protocol: string, property: string, receiver: any, value: any?) -> unknownas compute-engine declares it