Provides a single method deprecate to be used to declare when
something is going away.
class Legacy
  def self.klass_method
    # ...
  end
  def instance_method
    # ...
  end
  extend Gem::Deprecate
  deprecate :instance_method, "X.z", 2011, 4
  class << self
    extend Gem::Deprecate
    deprecate :klass_method, :none, 2011, 4
  end
end
    Namespace
    - MODULE Gem
 - MODULE Gem::Deprecate