Way to list both direct and indirect dependency together with PKGNG

[Yasuhiro KIMURA]

As previously announced, now dependency of package is not registered
recursively if PKGNG is used, and both 'pkg info -d' and 'pkg info -r'
show only direct dependency.

Then are there any easy way (program, script, simple one-liner etc.) 
to list all (both direct and indirect) dependency with PKGNG? 

My intention is to check if there are programs to be restarted when
some packages are updated. So simple list of packages is enough and no
further information such as dependency tree is required.

Regards.

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Yasuhiro KIMURA