nl_tokens: Reads the contents of the imported files .
pl_tokens: function readImports ( imports , data ) { return ( imports . length === 0 ) ? Promise . resolve ( [ imports , data ] ) : new Promise ( ( resolve , reject ) => { let i = 0 ; ( function proceed ( error , importData ) { if ( importData ) { imports [ i ++ ] . data = importData ; } if ( error ) { reject ( <mask> ) ; } else if ( i === imports . length ) { resolve ( [ imports , data ] ) ; } else { fs . readFile ( imports [ i ] . path , imports [ i ] . encoding , proceed ) ; } } ( ) ) ; } ) ; }