diff --git a/pandalib-util/src/main/java/fr/pandacube/lib/util/Lazy.java b/pandalib-util/src/main/java/fr/pandacube/lib/util/Lazy.java
index 1d5d24e..4f33e8a 100644
--- a/pandalib-util/src/main/java/fr/pandacube/lib/util/Lazy.java
+++ b/pandalib-util/src/main/java/fr/pandacube/lib/util/Lazy.java
@@ -56,4 +56,13 @@ public class Lazy<T> implements Supplier<T> {
 		cached = true;
 	}
 
+	/**
+	 * Tells if the value is currently set or not.
+	 * @return true if the value has been set by calling the method {@link #get()} or {@link #set(Object)} but not yet
+	 * reset by {@link #reset()}, or false otherwise.
+	 */
+	public synchronized boolean isSet() {
+		return cached;
+	}
+
 }
diff --git a/pandalib-util/src/main/java/fr/pandacube/lib/util/LazyOrException.java b/pandalib-util/src/main/java/fr/pandacube/lib/util/LazyOrException.java
index c3b5063..1dd1e45 100644
--- a/pandalib-util/src/main/java/fr/pandacube/lib/util/LazyOrException.java
+++ b/pandalib-util/src/main/java/fr/pandacube/lib/util/LazyOrException.java
@@ -58,4 +58,13 @@ public class LazyOrException<T, E extends Exception> implements SupplierExceptio
 		cached = true;
 	}
 
+	/**
+	 * Tells if the value is currently set or not.
+	 * @return true if the value has been set by calling the method {@link #get()} or {@link #set(Object)} but not yet
+	 * reset by {@link #reset()}, or false otherwise.
+	 */
+	public synchronized boolean isSet() {
+		return cached;
+	}
+
 }