form()

public function form( $instance ) {
if ( isset( $instance[ 'title' ] ) )
$title = $instance[ 'title' ];
else
$title = __( 'Default Title', 'hstngr_widget_domain' );
?>
<p>
<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />
</p>
<?php
}