src/main/java/org/fest/assertions/internal/Maps.java
public void assertEmpty(Description description, Map<?, ?> actual) {
    assertNotNull(description, actual);
    if (!actual.isEmpty()) {
      throw failures.failure(description, shouldBeEmpty(actual));
    }
  }
public void assertEmpty(Description description, Map<?, ?> actual) {
    assertNotNull(description, actual);
    if (!actual.isEmpty()) {
      throw failures.failure(description, shouldBeEmpty(actual));
    }
  }
Asserts that the given {@code Map} is empty.

@param description contains information about the assertion.
@param actual the given {@code Map}.
@throws AssertionError if the given {@code Map} is {@code null}.
@throws AssertionError if the given {@code Map} is not empty.