def export(*symbols)
      symbols = symbols.first if symbols.first.is_a?(Array)
      __exported_symbols.concat(symbols)
    end
def export(*symbols)
      symbols = symbols.first if symbols.first.is_a?(Array)
      __exported_symbols.concat(symbols)
    end
Adds given symbols to the exported_symbols array
 @param symbols [Array] array of symbols
 @return [void]