code: 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
  						}
  					}
  				}
docs: function blockChangesCb(diff){ _.errout('tODO')  }