Use ? to mark parameters as nullable to prevent PHP 8.4 deprecation warning

CloudObjects/SDK/CloudObject.php

@@ -85,7 +85,7 @@ class CloudObject {
      * Get the value of a property as a string.
      * If the property has multiple values, only the first is returned.
      */
-    public function getString($property, string $default = null) : ?string {
+    public function getString($property, ?string $default = null) : ?string {
         return $this->getReader()->getFirstValueString($this->node, $property, $default);
     }
 
@@ -93,7 +93,7 @@ class CloudObject {
      * Get the value of a property as an integer.
      * If the property has multiple values, only the first is returned.
      */
-    public function getInt($property, int $default = null) : ?int {
+    public function getInt($property, ?int $default = null) : ?int {
         return $this->getReader()->getFirstValueInt($this->node, $property, $default);
     }
 
@@ -101,7 +101,7 @@ class CloudObject {
      * Get the value of a property as a float.
      * If the property has multiple values, only the first is returned.
      */
-    public function getFloat($property, float $default = null) : ?float {
+    public function getFloat($property, ?float $default = null) : ?float {
         return $this->getReader()->getFirstValueFloat($this->node, $property, $default);
     }
 
@@ -109,7 +109,7 @@ class CloudObject {
      * Get the value of a property as a boolean.
      * If the property has multiple values, only the first is returned.
      */
-    public function getBool($property, bool $default = null) : ?bool {
+    public function getBool($property, ?bool $default = null) : ?bool {
         return $this->getReader()->getFirstValueBool($this->node, $property, $default);
     }
 
@@ -117,7 +117,7 @@ class CloudObject {
      * Get the value of a property as an IRI.
      * If the property has multiple values, only the first is returned.
      */
-    public function getIRI($property, IRI $default = null) : ?IRI {
+    public function getIRI($property, ?IRI $default = null) : ?IRI {
         return $this->getReader()->getFirstValueIRI($this->node, $property, $default);
     }
 
@@ -125,7 +125,7 @@ class CloudObject {
      * Get the value of a property as a Node.
      * If the property has multiple values, only the first is returned.
      */
-    public function getNode($property, Node $default = null) : ?Node {
+    public function getNode($property, ?Node $default = null) : ?Node {
         return $this->getReader()->getFirstValueNode($this->node, $property, $default);
     }