Store reference to label

I create custom class:

Code:

Ext.define('myApp.util.alignmentMonitor', {
    singleton: true,
    interval: 1000,
    lblSA: Ext.ComponentQuery.query('tbtext#sa_label')[0],
    .....

Is it possible to include reference to some txt label as property of my class?

Since i change label text very often I don't want to call "Ext.ComponentQuery.query" each time but save reference to my label and then just call that reference:

Code:

   this.lblSA.setText('new text');

What would be the bast way for doing this?



Store reference to label