old_contents: const DEFAULT_STATE = {
    searchTerm: ''
  }
  
  const rootReducer = (state = DEFAULT_STATE, action) => {
    switch (action.type) {
  
    }
  }
  
  export default rootReducer
  
new_contents: const DEFAULT_STATE = {
    searchTerm: ''
  }
  
  const rootReducer = (state = DEFAULT_STATE, action) => {
    switch (action.type) {
      default:
        return state
    }
  }
  
  export default rootReducer
  
subject: Add default case for switch statement