# File lib/apipie/extractor/writer.rb, line 280
      def overwrite_header(new_header)
        overwrite_line_from = action_line
        overwrite_line_to = action_line
        unless old_header.empty?
          overwrite_line_from -= ensure_line_breaks(old_header.lines).count
        end
        lines = ensure_line_breaks(controller_content.lines).to_a
        indentation = lines[action_line][/^\s*/]
        self.controller_content= (lines[0...overwrite_line_from] +
                              [new_header.gsub(/^/,indentation)] +
                              lines[overwrite_line_to..-1]).join
      end