$( function() {
  
    var $hello = $( "#hello" ).click( function() {
        alert( "hello world" );
     });

    // does NOT return object that includes the events property
    console.log( $hello.data() );  
  
    // does return events object
    console.log( $hello.data( "events" ) );

    // does return object that includes the events property
    console.log( $._data( $hello[ 0 ] ) );

    // does return evetns object
    console.log( $._data( $hello[ 0 ], "events" ) );
  
});