# File lib/sqlite3/driver/native/driver.rb, line 47
    def busy_handler( db, data=nil, &block )
      if block
        cb = API::CallbackData.new
        cb.proc = block
        cb.data = data
      end

      API.sqlite3_busy_handler( db,
        block ? API::Sqlite3_ruby_busy_handler : nil, cb )
    end