Solve Sonar issue in simple getter and setter methods with List

I write this getter/setter to list from Intellij source menu:

    public List<Error> getErrors() {
		return errors;

	public void setErrors(final List<Error> errors) {
		this.errors = errors;

And Sonar reporting two issues:

1. Return a copy of "errors".
2. Store a copy of "errors".

Please do not raise duplicate threads.

I will close this one.