To Call a lua table oriented function

[tpircsnarT]

-- funcs.lua
ProjectItem =
{
    name = "John Doe",
    given_name = "John",
    address = "123 Main St",
}


function ProjectItem:ShowName()
    print(self.name)
end

How do I call ProjectItem:ShowName() in main.go,
Expected result: John Doe