Move abstract fromXML to the proper place

Author: tvdijen

src/AbstractElement.php

@@ -250,13 +250,4 @@ public function isEmptyElement(): bool
     {
         return false;
     }
-
-
-    /**
-     * Create a class from XML
-     *
-     * @param \DOMElement $xml
-     * @return static
-     */
-    abstract public static function fromXML(DOMElement $xml): static;
 }

src/SerializableElementTrait.php

@@ -112,4 +112,14 @@ public function toArray(): array
      * @return \DOMElement
      */
     abstract public function toXML(DOMElement $parent = null): DOMElement;
+
+
+    /**
+     * Create a class from XML
+     *
+     * @param \DOMElement $xml
+     * @return static
+     * @psalm-suppress MethodSignatureMismatch
+     */
+    abstract public static function fromXML(DOMElement $xml): static;
 }