Inheritance at the template level

[blmalone]

Supporting inheritance at the template level would be useful if we wanted to reuse code from templates. For example, lets say we have a GasConfigTemplate that we want to inherit from and add additional functionality. Right now, this can't be done because the functions that are overridden.

contract A {
    function foo() internal pure virtual returns (string[] memory);
}

contract B is A {
    function foo() internal pure virtual override returns (string[] memory) {
        // This function is currently not virtual but can be.
    }
}

contract C is B {
    function foo() internal pure override returns (string[] memory) {
        // Further override - for additional features. 
    }
}