class Gem::Dependency

def encode_with(coder)
  [:@name, :@requirement, :@type, :@prerelease, :@version_requirements].each do |ivar|
    coder[ivar.to_s.sub(/^@/, "")] = instance_variable_get(ivar)
  end
end

def to_lock
  out = String.new("  #{name}")
  unless requirement.none?
    reqs = requirement.requirements.map {|o, v| "#{o} #{v}" }.sort.reverse
    out << " (#{reqs.join(", ")})"
  end
  out
end