nl_tokens: Pick the first existing directory from any of the given arguments .
pl_tokens: function reduceDirectories ( ) { return Array . prototype . slice . call ( arguments ) . map ( function ( candidate ) { return path . normalize ( candidate ) ; } ) . <mask> ( function ( candidate ) { return fs . existsSync ( candidate ) && fs . statSync ( candidate ) . isDirectory ( ) ; } ) . shift ( ) ; }