function blockChangesCb(diff){ _.errout('tODO')  }
function maintainEditSequence(up, addEditCb){
					if(currentSyncId !== up.syncId){
						//console.log('syncId changed from ' + currentSyncId + ' to ' + up.syncId)
						currentSyncId = up.syncId
						_.assertString(up.syncId)
						addEditCb(editCodes.setSyncId, {syncId: up.syncId}, up.editId)					
					}
					
					//_.assertUndefined(up.id)
					if(up.state){
						if(up.id) _.assertEqual(up.id, up.state.top)
						up.id = up.state.top
					}


					if(up.id !== -1){

						//console.log('currentResponseId: ' + currentResponseId + ' ' + up.id)
						if(currentResponseId !== up.id){
							if(_.isString(up.id)){
								//console.log('selecting: ' + JSON.stringify(up.id))
								addEditCb(editCodes.selectTopViewObject, {id: up.id}, up.editId)					
								curState = {}
							}else{
								addEditCb(editCodes.selectTopObject, {id: up.id},  up.editId)					
								//curPath = []
							}
						}
						currentResponseId = up.id
						
						if(_.isString(up.id)){
							
							if(up.state === undefined) _.errout('no up.state: ' + JSON.stringify(up))
							
							_.assertObject(up.state)
							var newState = up.state//[].concat(up.path)
							//console.log('editing to match: ' + JSON.stringify(curState) + ' -> ' + JSON.stringify(newState))
							pathmerger.editToMatch(curState, newState, function(op, edit){

								addEditCb(op, edit, up.editId)					
							})
							curState = newState
						}
					}
				}