diff --git a/citydb-model/src/main/java/org/citydb/model/appearance/TextureImageProperty.java b/citydb-model/src/main/java/org/citydb/model/appearance/TextureImageProperty.java
index b2f83189..76aacfe5 100644
--- a/citydb-model/src/main/java/org/citydb/model/appearance/TextureImageProperty.java
+++ b/citydb-model/src/main/java/org/citydb/model/appearance/TextureImageProperty.java
@@ -34,12 +34,12 @@ public class TextureImageProperty implements InlineOrByReferenceProperty<Externa
     private Reference reference;
 
     private TextureImageProperty(ExternalFile textureImage) {
-        this.textureImage = Objects.requireNonNull(textureImage, "The texture image must not be null.");;
+        this.textureImage = Objects.requireNonNull(textureImage, "The texture image must not be null.");
         reference = null;
     }
 
     private TextureImageProperty(Reference reference) {
-        this.reference = Objects.requireNonNull(reference, "The reference must not be null.");;
+        this.reference = Objects.requireNonNull(reference, "The reference must not be null.");
         textureImage = null;
     }
 
diff --git a/citydb-model/src/main/java/org/citydb/model/common/PropertyMap.java b/citydb-model/src/main/java/org/citydb/model/common/PropertyMap.java
index d9fee89a..3d9ae13b 100644
--- a/citydb-model/src/main/java/org/citydb/model/common/PropertyMap.java
+++ b/citydb-model/src/main/java/org/citydb/model/common/PropertyMap.java
@@ -188,6 +188,12 @@ public void putAll(PropertyMap<T> elements) {
         }
     }
 
+    public boolean remove(T element) {
+        return elements.getOrDefault(element.getName().getNamespace(), Collections.emptyMap())
+                .getOrDefault(element.getName().getLocalName(), Collections.emptyList())
+                .remove(element);
+    }
+
     public List<T> remove(Name name) {
         return elements.getOrDefault(name.getNamespace(), Collections.emptyMap())
                 .remove(name.getLocalName());