nl_tokens: Sets the byte offset into the file at which the next read / write will occur .
pl_tokens: function ( config ) { if ( config . offset == null ) { Ext . Logger . error ( 'Ext.device.filesystem.FileEntry#seek: You must specify an `offset` in the file.' ) ; return null ; } this . <mask> = config . offset || 0 ; if ( config . success ) { config . success . call ( config . scope || this ) ; } }