Match return types for addFirst and addLast with List

Bug: 313924276
Test: m EXPERIMENTAL_USE_OPENJDK21_TOOLCHAIN=true
Change-Id: I02c481f7bca2b5301f769d74773531b222b8049e

1 files changed, 2 insertions, 4 deletions

diff --git a/javaparser-core/src/main/java/com/github/javaparser/ast/NodeList.java b/javaparser-core/src/main/java/com/github/javaparser/ast/NodeList.java
index e10e0b477..aff5964db 100644
--- a/javaparser-core/src/main/java/com/github/javaparser/ast/NodeList.java
+++ b/javaparser-core/src/main/java/com/github/javaparser/ast/NodeList.java
@@ -185,17 +185,15 @@ public class NodeList<N extends Node> implements List<N>, Iterable<N>, HasParent
     /**
      * Inserts the node before all other nodes.
      */
-    public NodeList<N> addFirst(N node) {
+    public void addFirst(N node) {
         add(0, node);
-        return this;
     }
 
     /**
      * Inserts the node after all other nodes. (This is simply an alias for add.)
      */
-    public NodeList<N> addLast(N node) {
+    public void addLast(N node) {
         add(node);
-        return this;
     }
 
     /**