// new Class2().getSomething().someVariable

FieldAccess(
    object: MethodCall(
        object: ObjectCreation(
            className: "Class2",
            arguments: []
        ),
        methodName: "getSomething",
        arguments: []
    ),
    fieldName: "someVariable"
)

// Depending on how you represent methods/functions (i.e. first class or not), it might also make sense to treat methods like fields:

FieldAccess(
    object: FunctionCall(
        function: FieldAccess(
            object: ObjectCreation(
                className: "Class2",
                arguments: []
            ),
            fieldName: "getSomething"
        ),
        arguments: []
    ),
    fieldName: "someVariable"
)