Properly mark Generator and ShrinkStrategy with @FunctionalInterface

2 files changed, 2 insertions, 0 deletions

diff --git a/src/main/java/au/id/zancanaro/javacheck/Generator.java b/src/main/java/au/id/zancanaro/javacheck/Generator.java
index 0679f10..ac731de 100644
--- a/src/main/java/au/id/zancanaro/javacheck/Generator.java
+++ b/src/main/java/au/id/zancanaro/javacheck/Generator.java
@@ -22,6 +22,7 @@ import java.util.function.Predicate;
  * @param <T> The type generated by this generator.
  */
 @SuppressWarnings("unused")
+@FunctionalInterface
 public interface Generator<T> {
     /**
      * Return a {@link ShrinkTree} containing a new random value of the required
diff --git a/src/main/java/au/id/zancanaro/javacheck/ShrinkStrategy.java b/src/main/java/au/id/zancanaro/javacheck/ShrinkStrategy.java
index 6bd1eb9..0018309 100644
--- a/src/main/java/au/id/zancanaro/javacheck/ShrinkStrategy.java
+++ b/src/main/java/au/id/zancanaro/javacheck/ShrinkStrategy.java
@@ -2,6 +2,7 @@ package au.id.zancanaro.javacheck;
 
 import java.util.Iterator;
 
+@FunctionalInterface
 interface ShrinkStrategy<T> {
     Iterator<T> shrink(T obj);
 }