1 files changed, 7 insertions, 8 deletions
diff --git a/plugins/org.eclipse.sirius.diagram.sequence/src/org/eclipse/sirius/diagram/sequence/business/internal/operation/InverseRelativeNodePositionOperation.java b/plugins/org.eclipse.sirius.diagram.sequence/src/org/eclipse/sirius/diagram/sequence/business/internal/operation/InverseRelativeNodePositionOperation.java
index dcf25d3bf2..0ad0283802 100644
--- a/plugins/org.eclipse.sirius.diagram.sequence/src/org/eclipse/sirius/diagram/sequence/business/internal/operation/InverseRelativeNodePositionOperation.java
+++ b/plugins/org.eclipse.sirius.diagram.sequence/src/org/eclipse/sirius/diagram/sequence/business/internal/operation/InverseRelativeNodePositionOperation.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2010, 2015 THALES GLOBAL SERVICES and others.
+ * Copyright (c) 2010, 2021 THALES GLOBAL SERVICES and others.
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
@@ -12,17 +12,16 @@
  *******************************************************************************/
 package org.eclipse.sirius.diagram.sequence.business.internal.operation;
 
+import java.util.Objects;
+
 import org.eclipse.gmf.runtime.notation.Location;
 import org.eclipse.gmf.runtime.notation.Node;
-import org.eclipse.sirius.diagram.sequence.Messages;
+import org.eclipse.sirius.diagram.sequence.tool.internal.Messages;
 import org.eclipse.sirius.diagram.ui.business.internal.operation.AbstractModelChangeOperation;
 
-import com.google.common.base.Preconditions;
-
 /**
- * An operation to inverse the relative position of a node on both axes. This is
- * used for labels on messages to make sure they are always above the message,
- * regardless of its direction (left-to-right or right-to-left).
+ * An operation to inverse the relative position of a node on both axes. This is used for labels on messages to make
+ * sure they are always above the message, regardless of its direction (left-to-right or right-to-left).
  * 
  * @author pcdavid, smonnier
  */
@@ -37,7 +36,7 @@ public class InverseRelativeNodePositionOperation extends AbstractModelChangeOpe
      */
     public InverseRelativeNodePositionOperation(Node node) {
         super(Messages.InverseRelativeNodePositionOperation_operationName);
-        this.node = Preconditions.checkNotNull(node);
+        this.node = Objects.requireNonNull(node);
     }
 
     @Override