Fix

src/enums/MDMarkingPosition.php

@@ -4,7 +4,7 @@
 /**
  * Represents a marking position.
  */
-enum MDMarkingPosition implements MDValueEnumInterface, JsonSerializable, MDMeasurementUnitInterface {
+enum MDMarkingPosition implements MDValueEnumInterface, JsonSerializable {
 
     case front_front;
     case left;

src/enums/MDMarkingType.php

@@ -4,7 +4,7 @@
 /**
  * Represents a marking types.
  */
-enum MDMarkingType implements MDValueEnumInterface, JsonSerializable, MDMeasurementUnitInterface {
+enum MDMarkingType implements MDValueEnumInterface, JsonSerializable {
 
     case signature;
     case engraving;