nl_tokens: Copies a file
pl_tokens: function ( from , to ) { return new Promise ( ( resolve , reject ) => { util . mkParentPath ( to , function ( ) { var rs = fs . createReadStream ( from , { flags : "r" , encoding : "binary" } ) ; var ws = fs . createWriteStream ( to , { <mask> : "w" , encoding : "binary" } ) ; rs . on ( "end" , function ( ) { resolve ( ) ; } ) ; rs . on ( "error" , reject ) ; ws . on ( "error" , reject ) ; rs . pipe ( ws ) ; } ) ; } ) ; }