class Tapioca::Gemfile::GemSpec

def exported_rbi_tree
  rewriter = RBI::Rewriters::Merge.new(keep: RBI::Rewriters::Merge::Keep::NONE)
  exported_rbi_files.each do |file|
    rbi = RBI::Parser.parse_file(file)
    rewriter.merge(rbi)
  end
  rewriter.tree
end