def parse_selection_set(lexer: Lexer) -> SelectionSetNode:
    """SelectionSet: {Selection+}"""
    start = lexer.token
    return SelectionSetNode(
        selections=many_nodes(
            lexer, TokenKind.BRACE_L, parse_selection, TokenKind.BRACE_R
        ),
        loc=loc(lexer, start),
    )
SelectionSet: {Selection+}