Typo

Author: schmidt-sebastian

firebase-firestore/src/main/java/com/google/firebase/firestore/core/Target.java

@@ -220,7 +220,7 @@ public Bound getLowerBound(FieldIndex fieldIndex) {
               : getAscendingBound(segment, endAt);
 
       if (segmentBound.first == null) {
-        // No upper segmentBound exists
+        // No upper bound exists
         return null;
       }