nl_tokens: The real getHeader function : get one or more headers or all of them if you don t ask for any specifics .
pl_tokens: function ( <mask> , names ) { var keys = ( names && names . length > 0 ) ? names : Object . keys ( $H ( object ) ) ; var hash = keys . reduce ( function ( hash , key ) { hash [ key ] = getHeader ( object , key ) ; return hash ; } , { } ) ; // Freeze the resulting hash so you don't mistakenly think you're modifying // the real headers. Object . freeze ( hash ) ; return hash ; }