fix valid indication to provide a single possibility

Author: Łukasz Paczos

services-directions-models/src/main/java/com/mapbox/api/directions/v5/models/IntersectionLanes.java

@@ -63,12 +63,12 @@ public static Builder builder() {
    * When both active and valid are false, this property will not be included in the response.
    * Only available on the mapbox/driving profile.
    *
-   * @return Array of which of the lane indications is applicable to the current route,
+   * @return which of the lane indications is applicable to the current route,
    *   when there is more than one
    */
   @Nullable
   @SerializedName("valid_indication")
-  public abstract List<String> validIndications();
+  public abstract String validIndication();
 
   /**
    * Array that can be made up of multiple signs such as {@code left}, {@code right}, etc.
@@ -150,11 +150,11 @@ public abstract static class Builder {
      * Shows which of the lane indications is applicable to the current route,
      * when there is more than one.
      *
-     * @param validIndications list of lane indications that are applicable to the current route,
+     * @param validIndication lane indications applicable to the current route,
      *                         when there is more than one.
      * @return this builder for chaining options together
      */
-    public abstract Builder validIndications(@Nullable List<String> validIndications);
+    public abstract Builder validIndication(@Nullable String validIndication);
 
     /**
      * list that can be made up of multiple signs such as {@code left}, {@code right}, etc.

services-directions-models/src/test/java/com/mapbox/api/directions/v5/models/IntersectionLanesTest.java

@@ -26,7 +26,7 @@ public void testSerializableRoundTripping() throws Exception {
     IntersectionLanes intersectionLanes = IntersectionLanes.builder()
       .valid(true)
       .active(true)
-      .validIndications(Collections.singletonList("straight"))
+      .validIndication("straight")
       .indications(Arrays.asList("straight","slight left"))
       .build();
     byte[] serialized = TestUtils.serialize(intersectionLanes);
@@ -38,7 +38,7 @@ public void testJsonRoundTripping() {
     IntersectionLanes intersectionLanes = IntersectionLanes.builder()
       .valid(true)
       .active(true)
-      .validIndications(Collections.singletonList("straight"))
+      .validIndication("straight")
       .indications(Arrays.asList("straight","slight left"))
       .build();
 
@@ -61,12 +61,12 @@ public void testFromJson_active() {
   }
 
   @Test
-  public void testFromJson_validIndications() {
+  public void testFromJson_validIndication() {
     IntersectionLanes intersectionLanes = IntersectionLanes.builder()
-      .validIndications(Collections.singletonList("straight"))
+      .validIndication("straight")
       .build();
 
-    String jsonString = "{\"valid_indication\":[\"straight\"]}";
+    String jsonString = "{\"valid_indication\":\"straight\"}";
     IntersectionLanes intersectionLanesFromJson = IntersectionLanes.fromJson(jsonString);
 
     assertEquals(intersectionLanes, intersectionLanesFromJson);