why the content of listview.builder doesnt appear code example

Example 1: dynamic listview to do list flutter

body: new ListView.builder  (    itemCount: litems.length,    itemBuilder: (BuildContext ctxt, int index) {     return new Text(litems[index]);    }  )

Example 2: dynamic listview to do list flutter

// A Separate Function called from itemBuilderWidget buildBody(BuildContext ctxt, int index) {  return new Text(litems[index]);}body: new ListView.builder(  itemCount: litems.length,  itemBuilder: (BuildContext ctxt, int index) => buildBody(ctxt, index)),