private static @Nullable YAMLKeyValue getPreviousKeyValuePairBeforeEOL(@NotNull PsiElement element) {
    if (PsiUtilCore.getElementType(element.getParent()) != YAMLElementTypes.MAPPING) {
      // TODO: RUBY-22437 support JSON-like mappings
      return null;
    }
    boolean eolMet = false;
    PsiElement cur;
    for (cur = element; cur != null; cur = cur.getPrevSibling()) {
      if (!YAMLElementTypes.BLANK_ELEMENTS.contains(PsiUtilCore.getElementType(cur))) {
        break;
      }
      if (PsiUtilCore.getElementType(cur) == YAMLTokenTypes.EOL) {
        eolMet = true;
      }
    }
    if (eolMet && PsiUtilCore.getElementType(cur) == YAMLElementTypes.KEY_VALUE_PAIR) {
      return (YAMLKeyValue)cur;
    }
    return null;
  }
private static @Nullable YAMLKeyValue getPreviousKeyValuePairBeforeEOL(@NotNull PsiElement element)