diff --git a/AlgebraicDataflowArchitectureModel/src/algorithms/TypeInference.java b/AlgebraicDataflowArchitectureModel/src/algorithms/TypeInference.java
index 4e190bf..fb48b10 100644
--- a/AlgebraicDataflowArchitectureModel/src/algorithms/TypeInference.java
+++ b/AlgebraicDataflowArchitectureModel/src/algorithms/TypeInference.java
@@ -1516,7 +1516,7 @@
 		}
 	}
 	
-	public static Type createNewListType(Type compType, Type parentType) {
+	private static Type createNewListType(Type compType, Type parentType) {
 		String compTypeName = getInterfaceTypeName(compType);
 		List<Type> childrenTypes = getChildrenTypes(parentType, listComponentTypes.keySet());
 		Type newListType = new Type("List", "ArrayList<>", "List<" + compTypeName + ">", parentType);
@@ -1536,7 +1536,7 @@
 		return newListType;
 	}
 
-	public static Type createNewTupleType(List<Type> componentTypes, Type parentTupleType) {
+	private static Type createNewTupleType(List<Type> componentTypes, Type parentTupleType) {
 		String implTypeName = "AbstractMap.SimpleEntry<>";
 		String interfaceTypeName = "Map.Entry<$x>";
 		if (componentTypes.size() >= 2) {
@@ -1571,7 +1571,7 @@
 		return newTupleType;
 	}
 
-	public static Type createNewMapType(List<Type> componentTypes, Type parentMapType) {
+	private static Type createNewMapType(List<Type> componentTypes, Type parentMapType) {
 		String implTypeName = "HashMap<>";
 		String interfaceTypeName = "Map<$x, $y>";
 		if (componentTypes.size() == 2) {