@Override
  @Nullable
  public PsiElement getNameIdentifier() {
    PsiElement left = getLeft();
    if (!(left instanceof ShLiteralExpression)) return null;
    PsiElement first = left.getFirstChild();
    if (first instanceof LeafPsiElement && first.getNextSibling() == null && first.getNode().getElementType() == ShTypes.WORD) return left;
    return null;
  }
@Override
  @Nullable
  public PsiElement getNameIdentifier()