Source code from dependency with classifier cannot be found

If an app depends on a jar with a classifier then the sources cannot be found and you get the (rubbish) disassembler results. E.g.

		<dependency>
			<groupId>com.example</groupId>
			<artifactId>mylibrary</artifactId>
			<version>1.0.0-SNAPSHOT</version>
			<classifier>func</classifier>
		</dependency>

might have many classes, and source code, but none of them can be browsed.

使用 issue 中显示的带 classifier 的依赖项复现问题，并检查 extension 针对 Java 依赖项的源代码查找路径。完成的标准是，带 classifier 的 JAR 中的类能够提供其源代码以供浏览，而不只是提供反汇编器输出。