nl_tokens: Build a default value getter .
pl_tokens: function builder ( envList , envName ) { if ( envList == null ) { envList = DEFAULT_ENV_LIST ; } if ( envName == null ) { envName = DEFAULT_ENV_NAME ; } if ( ! Array . isArray ( envList ) ) { throw new Error ( 'envList must be an array' ) ; } if ( typeof envName !== 'string' ) { throw new Error ( 'envName must be a string' ) ; } // . const index = envList . indexOf ( env . <mask> ( envName , DEFAULT_ENV ) . required ( ) . asString ( ) ) ; /**
     * .
     */ // return function defaults(obj) { //   return 'object' !== typeof obj ? obj : obj[index]; // }; let body ; if ( index < 0 ) { body = 'return function defaults() {}' ; } else { body = ` ${ index } ` ; } return new Function ( body ) ( ) ; }