Help with a SELECTEDVALUE formula

Hi  what I usually do instead of using data groups in fiel parameters is to change a bit the code on the parameters itself to manually generate the group like this: 

Field Param Example = {
    ("Country", NAMEOF('Customers'[Country]), 0, "Group 1"),
    ("Region", NAMEOF('Customers'[Region]), 1, "Group 1"),
    ("City", NAMEOF('Customers'[City]), 2, "Group 1"),
    ("Address", NAMEOF('Customers'[Address]), 3, "Group 1"),
    ("Country", NAMEOF('Customers'[Country]), 0, "Group 2"),
    ("Region", NAMEOF('Customers'[Region]), 1, "Group 2"),
    ("City", NAMEOF('Customers'[City]), 2, "Group 2")
}

Syndicate_Admin

This way I think its easier to use the SELECTEDVALUE() function on the field parameter itself.

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Gonçalo Geraldes