src/main/java/org/fest/assertions/internal/Lists.java
public void assertDoesNotContainNull(Description description, List<?> actual) {
    assertNotNull(description, actual);
    assertNotEmpty(description, actual);
    if (actual.contains(null)) {
      throw failures.failure(description, shouldNotContainNull(actual));
    }
  }
public void assertDoesNotContainNull(Description description, List<?> actual) {
    assertNotNull(description, actual);
    assertNotEmpty(description, actual);
    if (actual.contains(null)) {
      throw failures.failure(description, shouldNotContainNull(actual));
    }
  }
Asserts that the given {@code List} does not contain {@code null}.

@param description contains information about the assertion.
@param actual      the given {@code List}.
@throws AssertionError if the given {@code List} is {@code null}.
@throws AssertionError if the given {@code List} contains any of given values.