Can't add settings to new table template extension

[#1]

I'm brand new to Qlik Sense and the first thing I though I would try and achieve is adding some basic formatting settings to the table control.

I created a new extension in workbench using the table template and simply try adding 1 setting;

  uses: "settings",

                    items : {

                    headerBackground : {

                        ref "qBgColour": ,

                        label : "Header Background Colour",

                        type : "String",

                        defaultValue : "#fff"

                      }

                    }

But instead of adding the setting option in the properties panel, it breaks it (I don't see Data & Sorting areas anymore... just Appearance

Any pointers as to where i've gone wrong? (or where I can read up?).

Thanks

Lee

[#2 · Accepted solution]

Must need my eyes checked- there was a typo on the ref line;

ref "qBgColour": ,

should have been;

 ref : "qBgColour",

Things are looking better now, although still not quite there...