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~/NetBeansProjects/jruby ➔ ../v1_8_6_114/ruby -e "module XXX; end; module YYY; end; p XXX::YYY"
-e:1: uninitialized constant XXX::YYY (NameError)
~/NetBeansProjects/jruby ➔ ../v1_8_6_114/ruby -e "class XXX; end; class YYY; end; p XXX::YYY"
-e:1: warning: toplevel constant YYY referenced by XXX::YYY
YYY