@NotNull
  public static ShLiteral createLiteral(@NotNull Project project, @NotNull String command) {
    PsiFile file = createTempFile(project, command);
    ShLiteral literal = PsiTreeUtil.findChildOfType(file, ShLiteral.class);
    assert literal != null;
    return literal;
  }
@NotNull
  public static ShLiteral createLiteral(@NotNull Project project, @NotNull String command)