/usr/ is in libatk1.0-dev 2.10.0-2ubuntu2.
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..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/atk.pc
/usr/include/
/usr/include/atk-1.0/
/usr/include/atk-1.0/atk/
/usr/include/atk-1.0/atk/atkaction.h
/usr/include/atk-1.0/atk/atknoopobject.h
/usr/include/atk-1.0/atk/atknoopobjectfactory.h
/usr/include/atk-1.0/atk/atkobjectfactory.h
/usr/include/atk-1.0/atk/atkwindow.h
/usr/include/atk-1.0/atk/atkmisc.h
/usr/include/atk-1.0/atk/atkeditabletext.h
/usr/include/atk-1.0/atk/atkstreamablecontent.h
/usr/include/atk-1.0/atk/atktext.h
/usr/include/atk-1.0/atk/atkrelation.h
/usr/include/atk-1.0/atk/atkregistry.h
/usr/include/atk-1.0/atk/atkcomponent.h
/usr/include/atk-1.0/atk/atkdocument.h
/usr/include/atk-1.0/atk/atktable.h
/usr/include/atk-1.0/atk/atkhyperlink.h
/usr/include/atk-1.0/atk/atkhypertext.h
/usr/include/atk-1.0/atk/atkrelationtype.h
/usr/include/atk-1.0/atk/atksocket.h
/usr/include/atk-1.0/atk/atkhyperlinkimpl.h
/usr/include/atk-1.0/atk/atkplug.h
/usr/include/atk-1.0/atk/atkobject.h
/usr/include/atk-1.0/atk/atkselection.h
/usr/include/atk-1.0/atk/atk.h
/usr/include/atk-1.0/atk/atkversion.h
/usr/include/atk-1.0/atk/atkimage.h
/usr/include/atk-1.0/atk/atkstate.h
/usr/include/atk-1.0/atk/atkrelationset.h
/usr/include/atk-1.0/atk/atkgobjectaccessible.h
/usr/include/atk-1.0/atk/atk-enum-types.h
/usr/include/atk-1.0/atk/atkstateset.h
/usr/include/atk-1.0/atk/atkvalue.h
/usr/include/atk-1.0/atk/atkutil.h
/usr/share/
/usr/share/doc/
/usr/share/doc/libatk1.0-dev/
/usr/share/doc/libatk1.0-dev/copyright
/usr/share/gir-1.0/
/usr/share/gir-1.0/Atk-1.0.gir
/usr/lib/x86_64-linux-gnu/libatk-1.0.so
/usr/share/doc/libatk1.0-dev/AUTHORS
/usr/share/doc/libatk1.0-dev/NEWS.gz
/usr/share/doc/libatk1.0-dev/README
/usr/share/doc/libatk1.0-dev/changelog.Debian.gz