code: public @Nonnull
    StringAssert isEqualToIgnoringCase(@Nullable String expected) {
      strings.assertEqualsIgnoringCase(description, actual, expected);
      return this;
    }
docs: Verifies that the <em>actual</em> {@code String} is equal to the given one, ignoring case considerations.
  
  @param expected the given {@code String} to compare the actual {@code String} to.
  @return {@code this} assertion object.
  @throws AssertionError if the <em>actual</em> {@code String} is not equal to the given one.