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

@param description the description of the <em>actual</em> {@code String}.
@param actual the <em>actual</em> {@code String}.
@throws AssertionError if the <em>actual</em> {@code String} is {@code null}.
@throws AssertionError if the <em>actual</em> {@code String} is not empty.