144     for (let edge of this.edges) {  variable
162       for (let edge of node.edges) {  variable
329     for (let edge of this.rootNode!.edges) {  variable
356       let edge = this.edges[retainerEdgeIdx];  variable
429           for (let edge of node.edges) {  variable
452     for (let edge of this.rootNode.edges) {  variable
633     for (let edge of node.edges) {  variable
650     for (let edge of this.rootNode!.edges) {  variable
663       for (let edge of node.edges) {  variable
686     for (let edge of this.rootNode.edges) {  variable
704       for (let edge of node.edges) {  variable
724       let edge = this.edges[retainingEdgeIdx];  variable
966     for (let edge of node.edges) {  variable