Allow null keys in order to be a little more flexible.

Author: Bertware

src/Trafiklab/Common/Model/Contract/PublicTransportApiWrapper.php

@@ -27,30 +27,30 @@ interface PublicTransportApiWrapper
      *
      * @param string $userAgent The user agent to send along with every request.
      */
-    public function setUserAgent(string $userAgent): void;
+    public function setUserAgent(?string $userAgent): void;
 
 
     /**
      * Set the API key used for route-planning.
      *
      * @param string $apiKey The API key to use.
      */
-    public function setRoutePlanningApiKey(string $apiKey): void;
+    public function setRoutePlanningApiKey(?string $apiKey): void;
 
 
     /**
      * Set the API key used for route-planning.
      *
      * @param string $apiKey The API key to use.
      */
-    public function setTimeTablesApiKey(string $apiKey): void;
+    public function setTimeTablesApiKey(?string $apiKey): void;
 
     /**
      * Set the API key used for looking up stop locations.
      *
      * @param string $apiKey The API key to use.
      */
-    public function setStopLocationLookupApiKey(string $apiKey): void;
+    public function setStopLocationLookupApiKey(?string $apiKey): void;
 
     /**
      * Get a timetable for a certain stop.

src/Trafiklab/Common/Model/Contract/Vehicle.php

@@ -20,15 +20,15 @@ public function getName(): string;
      *
      * @return int
      */
-    public function getNumber(): int;
+    public function getNumber(): ?int;
 
 
     /**
      * The line number of the vehicle, identifying the line on which it runs. Example: 41X.
      *
      * @return string
      */
-    public function getLineNumber(): string;
+    public function getLineNumber(): ?string;
 
     /**
      * The type of vehicle. Example: "Snabbtåg".