--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/env/lib/python3.7/site-packages/gxformat2/_labels.py	Thu May 14 14:56:58 2020 -0400
@@ -0,0 +1,27 @@
+"""Utilities for handling unlabelled objects when translating workflow formats."""
+
+
+class Labels(object):
+    """Track labels assigned and generate anonymous ones."""
+
+    def __init__(self):
+        """Initialize labels that have been encountered or generated."""
+        self.seen_labels = set()
+        self.anonymous_labels = 0
+
+    def ensure_new_output_label(self, label):
+        """Ensure supplied label has value or generate an anonymous one."""
+        if label is None:
+            self.anonymous_labels += 1
+            label = "_anonymous_output_%d" % self.anonymous_labels
+        assert label not in self.seen_labels
+        self.seen_labels.add(label)
+        return label
+
+    @staticmethod
+    def is_anonymous_output_label(label):
+        """Predicate determining if supplied label was generated for anonymous output."""
+        # label likely can't be null according to the schema definition - but we've got a test
+        # in Galaxy that doesn't define a label in order to great a .ga file without output
+        # labels (which is completely normal).
+        return not label or label.startswith("_anonymous_output_")