operator [] method
Gets a runtime object for type.
Callers typically invoke this method, passing their runtimeType in order to retrieve their runtime object.
It is important to note that a runtime object must exist for every
class that extends a class that has a runtime. Use MirrorContext.getSubclassesOf when compiling.
In other words, if the type Base has a runtime and the type Subclass extends Base,
Subclass must also have a runtime. The runtime objects for both Subclass and Base
must be the same type.
Implementation
dynamic operator [](Type type) => runtimes[type];