public class AssertTwice {

  private void assertOnce() {
    String methodDeclaration = null;
    assert methodDeclaration != null;
    methodDeclaration = null;
  }

  private void assertTwice() {
    String methodDeclaration = null;
    assert methodDeclaration != null;
    assert methodDeclaration != null;
    methodDeclaration = null;
  }

  private void assertTwiceWithUse() {
    String methodDeclaration = null;
    assert methodDeclaration != null : "@AssumeAssertion(nullness)";
    methodDeclaration.toString();
    // :: warning: (nulltest.redundant)
    assert methodDeclaration != null;
    methodDeclaration = null;
  }

  public static @org.checkerframework.checker.nullness.qual.Nullable Object n = "m";

  private void twiceWithChecks() {
    assert n != null;
    n = null;
  }
}