nl_tokens: Creates Observable transformation from configuration .
pl_tokens: function materializedRetryStrategy ( strategy ) { return function ( source ) { switch ( strategy . kind ) { case "ignoreErrorJustComplete" : return source . pipe ( catchError_1 . catchError ( function ( e ) { dispatchError ( e ) ; return rx . empty ( ) ; } ) ) ; case "ignoreErrorAndReturn" : return source . pipe ( catchError_1 . catchError ( function ( e ) { dispatchError ( e ) ; return rx . of ( strategy . value ) ; } ) ) ; <mask> "exponentialBackoff" : return rx . defer ( function ( ) { var counter = 1 ; return source . pipe ( tap_1 . tap ( function ( ) { counter = 1 ; } , function ( ) { if ( counter * 2 <= strategy . maxBackoffFactor ) { counter *= 2 ; } } ) , retryWhen_1 . retryWhen ( function ( e ) { return e . pipe ( switchMap_1 . switchMap ( function ( x ) { dispatchError ( x ) ; return rx . of ( 0 ) . pipe ( delay_1 . delay ( strategy . initialTimeout * counter * 1000 ) ) ; } ) ) ; } ) ) ; } ) ; case "catchError" : return source . pipe ( catchError_1 . catchError ( function ( e ) { dispatchError ( e ) ; return rx . of ( strategy . handle ( e ) ) ; } ) ) ; default : return js_extensions_1 . unhandledCase ( strategy ) ; } } ; }