When this method is invoked, a new TypeDeclaration object is created by the transformation framework.

当调用该方法时，转换框架就生成新的 TypeDeclaration 对象。

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For instance, if you type classs instead of class, it will affect the creation of a TypeDeclaration node, and it will be an error.

比方说，如果输入classs而不是输入class，那么会影响到TypeDeclaration节点的创建，这就是一个错误。

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Because you have defined this extension to be invoked when the transformation is processing a UML class, you can safely type the target object to an Abstract Syntax Tree (AST) TypeDeclaration object.

因为当转换处理UM l类时，您已经定义调用该扩展，所以您可以安全地向Abstract Syntax Tree (ast) TypeDeclaration对象输入目标对象。

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