module RBS
  module Annotate
    class Formatter
      attr_reader buffer: String

      @pending_separator: String?

      def initialize: () -> void

      def <<: (String | RDoc::Markup::Document | nil) -> self

      def margin: (?separator: String) -> self

      def empty?: () -> bool

      def format: (newline_at_end: bool) -> String

      def self.translate: (RDoc::Markup::Document) -> String?

      def self.each_part: (RDoc::Markup::Document) { (RDoc::Markup::Document) -> void } -> void
                        | (RDoc::Markup::Document) -> Enumerator[RDoc::Markup::Document, void]
    end
  end
end