Pete Bacon Darwin 185b932138 refactor(ivy): TypeScriptReflectionHost.isClass cannot be a type discriminator (#24897)
The `ReflectionHost` interface that is being implemented only expects a
return value of `boolean`.

Moreover, if you want to extend this class to support non-TS code formats,
e.g. ES5, the result of this call returning true does not mean that the `node`
is a `ClassDeclaration`. It could be a `VariableDeclaration`.

PR Close #24897
2018-07-27 17:15:30 -07:00
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