What does it mean when a function is called in the head of constructor() function?

Question

I'm reading through some smart contracts and I noticed functions being called in the head of the constructor function, like MarginAdmin() in the following example.

constructor(address vault, address proxy)
    public
    MarginAdmin()
{
    state = MarginState.State({
        VAULT: vault,
        PROXY: proxy
    });
}

In this case, MarginAdmin is another solidity contract that is being imported into this file. What does this mean when a function gets called like this in the head of constructor function?

Answer 1

I assume the contract in question inherits from MarginAdmin (e.g. contract Foo is MarginAdmin).

MarginAdmin() is how the constructor for MarginAdmin (the "base class") is invoked.

See https://solidity.readthedocs.io/en/v0.4.24/contracts.html#inheritance for more details about contract inheritance.