empty notes doesnt fail

app/crawler/notes.sh

@@ -24,6 +24,9 @@ notes() (
 	_recurse_ids() {
 		local prefix="$1"
 		local json="$2"
+		if echo "$json" | jq .Branches | grep -q ^null$; then
+			return 0
+		fi
 		local b64lines="$(echo "$json" | jq -r '.Branches | keys[]' | base64)"
 		if [ -z "$b64lines" ]; then
 			return 0

spike/review/reinvent/ezmded/server/tree.go

@@ -9,8 +9,8 @@ import (
 )
 
 type Branch struct {
-	Leaf     Leaf              `json:"Leaf,omitempty"`
-	Branches map[string]Branch `json:"Branches,omitempty"`
+	Leaf     Leaf
+	Branches map[string]Branch
 }
 
 func (branch Branch) IsZero() bool {