Get item value from buying.py

Hi sir
I need to get a item value from buying.py (ex. referencevalue)
“label”: _(“Supplier”),
“items”: [
{
“type”: “doctype”,
“name”: “Supplier”,
“label” : " Potential Suppliers",
"reference" : 123,
“onboard”: 1,
“description”: _(“Supplier database.”),
},
{
“type”: “doctype”,
“name”: “Supplier Group”,
“description”: _(“Supplier Group master.”)
},

from supplier_list.js to handle the listview depend on reference value
Is that applicable ??!