public @NotNull PsiElement createSpace() {
    final YAMLKeyValue keyValue = createYamlKeyValue("foo", "bar");
    final ASTNode whitespaceNode = keyValue.getNode().findChildByType(TokenType.WHITE_SPACE);
    assert whitespaceNode != null;
    return whitespaceNode.getPsi();
  }
public @NotNull PsiElement createSpace()