src/main/java/org/fest/assertions/internal/Objects.java
public void assertIsInstanceOfAny(Description description, Object actual, Class<?>[] types) {
    checkNotNullOrEmpty(types);
    assertNotNull(description, actual);
    if (!isInstanceOfAny(actual, types)) {
      String format = "expecting <%s> to be an instance of any of:<%s> but was instance of:<%s>";
      throw failures.failure(description, new BasicErrorMessageFactory(format, actual, types, actual.getClass()));
    }
  }
public void assertIsInstanceOfAny(Description description, Object actual, Class<?>[] types) {
    checkNotNullOrEmpty(types);
    assertNotNull(description, actual);
    if (!isInstanceOfAny(actual, types)) {
      String format = "expecting <%s> to be an instance of any of:<%s> but was instance of:<%s>";
      throw failures.failure(description, new BasicErrorMessageFactory(format, actual, types, actual.getClass()));
    }
  }
Verifies that the <em>actual</em> object is an instance of any of the given types.

@param description the description of the <em>actual</em> object.
@param actual the <em>actual</em> object.
@param types the types to check the <em>actual</em> object against.
@throws NullPointerException if the given array is {@code null}.
@throws IllegalArgumentException if the given array is empty.
@throws NullPointerException if the given array has {@code null} elements.
@throws AssertionError if the <em>actual</em> object is {@code null}.
@throws AssertionError if the <em>actual</em> object is not an instance of any of the given types.