Returns true, if the extension finder checks extensions for its required plugins.
This feature has to be enabled, in order check the availability of
Extension#plugins() configured by an extension.
This feature is enabled by default, if at least one available plugin makes use of
optional plugin dependencies. Those optional plugins might not be available at runtime.
Therefore any extension is checked by default against available plugins before its
instantiation.
Notice: This feature requires the optional ASM library
to be available on the applications classpath.