ExtJS. Checkbox in sourceConfig of property grid

In sourceConfig of property grid i have a field, which i want to be displayed as checkbox.

Currently, i'm set up only editor, but it renders checkbox only when field is clicked, else it shows simple text:

field: {
    editor:
            Ext.create('Ext.grid.CellEditor', { field: Ext.create('Ext.form.field.Checkbox')})
}

Question is, how can i set up renderer to show checkbox?