README.md edited

.venv/lib/python3.10/site-packages/openpyxl/workbook/external_reference.py

@@ -0,0 +1,18 @@
+# Copyright (c) 2010-2024 openpyxl
+
+from openpyxl.descriptors.serialisable import Serialisable
+from openpyxl.descriptors import (
+    Sequence
+)
+from openpyxl.descriptors.excel import (
+    Relation,
+)
+
+class ExternalReference(Serialisable):
+
+    tagname = "externalReference"
+
+    id = Relation()
+
+    def __init__(self, id):
+        self.id = id