How to set Path prefix Elements in gnmi_get

I would like to give the prefix path and set the Elem field in below structure using gnmi_get.
p prefix
*github.com/openconfig/gnmi/proto/gnmi.Path {
Element: []string len: 0, cap: 0, nil,
Origin: "",
Elem: []*github.com/openconfig/gnmi/proto/gnmi.PathElem len: 0, cap: 0, nil,
Target: "CONFIG_DB",
XXX_NoUnkeyedLiteral: struct {} {},
XXX_unrecognized: []uint8 len: 0, cap: 0, nil,
XXX_sizecache: 0,}