Update README.md
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index a8776a6..c200d54 100644
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@@ -8,7 +8,7 @@
}
The `initialize` method will be called once for each annotation. The type `T` is
-determined by what was annotated. For libraries it will be the Symbol
+determined by what was annotated. For libraries it will be a `LibraryIdentifier`
representing that library, for a class it will be the Type representing that
class, and for a top level method it will be the Function object representing
that method.
