@Nullable
  public static GrVariable findVariable(@NotNull GrStatement statement) {
    if (!(statement instanceof GrVariableDeclaration variableDeclaration)) return null;
    final GrVariable[] variables = variableDeclaration.getVariables();

    GrVariable var = null;
    if (variables.length == 1) {
      var = variables[0];
    }
    if (var instanceof GrParameter || var instanceof GrField) {
      return null;
    }
    return var;
  }
@Nullable
  public static GrVariable findVariable(@NotNull GrStatement statement)