lib/Ext/LoadMask.js
function(newMessage) {
        var cls = Ext.baseCSSPrefix + 'has-message';

        if (newMessage) {
            this.addCls(cls);
        } else {
            this.removeCls(cls);
        }

        this.messageElement.setHtml(newMessage);
    }
function(newMessage) {
        var cls = Ext.baseCSSPrefix + 'has-message';

        if (newMessage) {
            this.addCls(cls);
        } else {
            this.removeCls(cls);
        }

        this.messageElement.setHtml(newMessage);
    }
Updates the message element with the new value of the {@link #message} configuration
@private