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-rw-r--r--src/main/scala/firrtl/graph/DiGraph.scala2
-rw-r--r--src/main/scala/firrtl/graph/EdgeData.scala2
-rw-r--r--src/main/scala/firrtl/graph/EulerTour.scala2
-rw-r--r--src/main/scala/firrtl/graph/RenderDiGraph.scala2
4 files changed, 4 insertions, 4 deletions
diff --git a/src/main/scala/firrtl/graph/DiGraph.scala b/src/main/scala/firrtl/graph/DiGraph.scala
index 7720028c..b99c6961 100644
--- a/src/main/scala/firrtl/graph/DiGraph.scala
+++ b/src/main/scala/firrtl/graph/DiGraph.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
package firrtl.graph
diff --git a/src/main/scala/firrtl/graph/EdgeData.scala b/src/main/scala/firrtl/graph/EdgeData.scala
index 6a63c3b9..92ff3405 100644
--- a/src/main/scala/firrtl/graph/EdgeData.scala
+++ b/src/main/scala/firrtl/graph/EdgeData.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
package firrtl.graph
diff --git a/src/main/scala/firrtl/graph/EulerTour.scala b/src/main/scala/firrtl/graph/EulerTour.scala
index 5e075ae2..5268f91c 100644
--- a/src/main/scala/firrtl/graph/EulerTour.scala
+++ b/src/main/scala/firrtl/graph/EulerTour.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
package firrtl.graph
diff --git a/src/main/scala/firrtl/graph/RenderDiGraph.scala b/src/main/scala/firrtl/graph/RenderDiGraph.scala
index 45be3a8f..d726c8b4 100644
--- a/src/main/scala/firrtl/graph/RenderDiGraph.scala
+++ b/src/main/scala/firrtl/graph/RenderDiGraph.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
package firrtl.graph