1 files changed, 4 insertions, 4 deletions
diff --git a/Source/SPTreeNode.h b/Source/SPTreeNode.h
index f93157ea..62682af8 100644
--- a/Source/SPTreeNode.h
+++ b/Source/SPTreeNode.h
@@ -42,14 +42,14 @@
 
 - (void)removeObjectFromChildren:(id)object;
 
-- (NSArray *)descendants;
-- (NSArray *)allChildLeafs;
-- (NSArray *)groupChildren;
+- (NSMutableArray *)descendants;
+- (NSMutableArray *)childLeafs;
+- (NSMutableArray *)allChildLeafs;
+- (NSMutableArray *)groupChildren;
 
 - (SPTreeNode *)parentFromArray:(NSArray *)array;
 
 - (BOOL)isDescendantOfOrOneOfNodes:(NSArray *)nodes;
-- (BOOL)isDescendantOfNodes:(NSArray *)nodes;
 
 - (NSDictionary *)dictionaryRepresentation;