diff --git a/src/main/java/net/fortuna/ical4j/model/Component.java b/src/main/java/net/fortuna/ical4j/model/Component.java
index 115b8aeec..fc213831e 100644
--- a/src/main/java/net/fortuna/ical4j/model/Component.java
+++ b/src/main/java/net/fortuna/ical4j/model/Component.java
@@ -194,26 +194,6 @@ public final PropertyList<Property> getProperties() {
         return properties;
     }
 
-    /**
-     * Convenience method for retrieving a list of named properties.
-     *
-     * @param name name of properties to retrieve
-     * @return a property list containing only properties with the specified name
-     */
-    public final <C extends Property> PropertyList<C> getProperties(final String name) {
-        return getProperties().getProperties(name);
-    }
-
-    /**
-     * Convenience method for retrieving a named property.
-     *
-     * @param name name of the property to retrieve
-     * @return the first matching property in the property list with the specified name
-     */
-    public final <T extends Property> T getProperty(final String name) {
-        return (T) getProperties().getProperty(name);
-    }
-
     /**
      * Convenience method for retrieving a required named property.
      *
diff --git a/src/main/java/net/fortuna/ical4j/model/ComponentList.java b/src/main/java/net/fortuna/ical4j/model/ComponentList.java
index b42e720f4..6ab6ad6c1 100644
--- a/src/main/java/net/fortuna/ical4j/model/ComponentList.java
+++ b/src/main/java/net/fortuna/ical4j/model/ComponentList.java
@@ -117,7 +117,7 @@ public final T getComponent(final String aName) {
      */
     @SuppressWarnings("unchecked")
 	public final <C extends T> ComponentList<C> getComponents(final String name) {
-        final ComponentList<C> components = new ComponentList<C>();
+        final ComponentList<C> components = new ComponentList<>();
         for (final T c : this) {
             if (c.getName().equals(name)) {
                 components.add((C) c);
diff --git a/src/main/java/net/fortuna/ical4j/model/ParameterList.java b/src/main/java/net/fortuna/ical4j/model/ParameterList.java
index 70abc5bf8..78ea7864b 100644
--- a/src/main/java/net/fortuna/ical4j/model/ParameterList.java
+++ b/src/main/java/net/fortuna/ical4j/model/ParameterList.java
@@ -176,6 +176,15 @@ public final boolean isEmpty() {
         return parameters.isEmpty();
     }
 
+    /**
+     * Returns true if this parameter list includes the specified parameter.
+     * @param parameter a parameter specification
+     * @return true if parameter matching specification is found
+     */
+    public boolean contains(Parameter parameter) {
+        return parameters.contains(parameter);
+    }
+
     /**
      * @return an iterator
      * @see List#iterator()
diff --git a/src/main/java/net/fortuna/ical4j/model/PropertyContainer.java b/src/main/java/net/fortuna/ical4j/model/PropertyContainer.java
index c6e5bdcfc..6ee8663f9 100644
--- a/src/main/java/net/fortuna/ical4j/model/PropertyContainer.java
+++ b/src/main/java/net/fortuna/ical4j/model/PropertyContainer.java
@@ -4,7 +4,11 @@ public interface PropertyContainer {
 
     PropertyList<Property> getProperties();
 
-    <T extends Property> PropertyList<T> getProperties(final String name);
+    default <T extends Property> PropertyList<T> getProperties(final String name) {
+        return getProperties().getProperties(name);
+    }
 
-    <T extends Property> T getProperty(final String name);
+    default <T extends Property> T getProperty(final String name) {
+        return getProperties().getProperty(name);
+    }
 }