nl_tokens: / --- Streams
pl_tokens: function ReadStream ( opts ) { assert . object ( opts ) ; if ( opts . encoding !== null ) assert . optionalString ( opts . encoding , 'options.encoding' ) ; assert . optionalNumber ( opts . <mask> , 'options.end' ) ; assert . optionalNumber ( opts . fd , 'options.fd' ) ; assert . object ( opts . fs , 'options.fs' ) ; assert . optionalNumber ( opts . start , 'options.start' ) ; assert . optionalBool ( opts . autoClose , 'options.autoClose' ) ; stream . Readable . call ( this , opts ) ; this . autoClose = opts . autoClose === undefined ? true : opts . autoClose ; this . encoding = opts . encoding || null ; this . _fd = opts . fd ; this . _fs = opts . fs ; this . _end = opts . end || Infinity ; this . _start = opts . start || 0 ; this . _pos = this . _start ; this . _range = this . _end - this . _start ; if ( this . _fd ) { setImmediate ( this . emit . bind ( this , 'open' , this . _fd ) ) ; } else { this . _opening = true ; } }