wrappers: add CLIAssembly.external property

dotnet/wrappers.py

@@ -2,7 +2,7 @@ import destruct
 
 from .util import cached_property
 from .common import CLIStreamType, CLIStreamIndex, CLITableType, CLITableIndex, CLITableRange, CLIToken, CLICodedToken
-from .tables import CLITypeClassSemantics
+from .tables import CLITypeClassSemantics, CLIAssemblyRefTable
 from .code import determine_header
 
 
@@ -246,6 +246,10 @@ class CLIClass(CLITableWrapper):
 @register_wrapper(CLITableType.Assembly)
 @register_wrapper(CLITableType.AssemblyRef)
 class CLIAssembly(CLITableWrapper):
+    @property
+    def external(self):
+        return isinstance(self._raw, CLIAssemblyRefTable)
+
     def __repr__(self):
         return '<{}: {} (v{}.{}.{}.{})>'.format(
             self.__class__.__name__, self.name,