Ruby 2.2.0 リファレンスマニュアル > ライブラリ一覧 > rubygems/dependency_listライブラリ > Gem::DependencyListクラス > spec_predecessors

instance method Gem::DependencyList#spec_predecessors

spec_predecessors -> Hash[permalink][rdoc]

[TODO] ???

Return a hash of predecessors. <tt>result[spec]</tt> is an Array of gemspecs that have a dependency satisfied by the named spec.