Return dict representation of `node`s elements.

def visit_Dict(self, node: AST, dfltChaining: bool = True) -> str:
        """Return dict representation of `node`s elements."""
        items = (': '.join((self.visit(key), self.visit(value)))
                 for key, value in zip(node.keys, node.values))
        return f"{{{', '.join(items)}}}"