nl_tokens: can be called with returnOpenOrders ( all callback )
pl_tokens: function ( currencyA , currencyB , callback ) { if ( typeof currencyB === 'function' ) { callback = currencyB ; currencyB = null ; } const parameters = { currencyPair : joinCurrencies ( currencyA , currencyB ) } ; return this . _private ( 'returnOpenOrders' , parameters , <mask> ) ; }