public @NotNull YAMLKeyValue createYamlKeyValue(@NotNull String keyName, @NotNull String valueText) {
    final PsiFile tempValueFile = createDummyYamlWithText(valueText);
    Collection<YAMLValue> values = PsiTreeUtil.collectElementsOfType(tempValueFile, YAMLValue.class);

    String text;
    if (values.isEmpty()) {
      text = keyName + ":";
    }
    else if (values.iterator().next() instanceof YAMLScalar && !valueText.contains("\n")) {
      text = keyName + ": " + valueText;
    }
    else {
      text = keyName + ":\n" + YAMLTextUtil.indentText(valueText, 2);
    }

    final PsiFile tempFile = createDummyYamlWithText(text);
    return PsiTreeUtil.collectElementsOfType(tempFile, YAMLKeyValue.class).iterator().next();
  }
public @NotNull YAMLKeyValue createYamlKeyValue(@NotNull String keyName, @NotNull String valueText)