const sourcePreviousNode: INode = sourceTree[sourceNodeIndex - 1];
if (sourcePreviousNode) {
Previous node in source is a setting.
Find the same setting in the target.
Insert it after that setting
*/
if (sourcePreviousNode.setting) {
const targetPreviousSetting = findSettingNode(sourcePreviousNode.setting.key, targetTree);
if (targetPreviousSetting) {