src/main/java/org/fest/assertions/internal/Characters.java
public void assertLowerCase(Description description, Character actual) {
    assertNotNull(description, actual);
    if (!isLowerCase(actual)) {
      throw failures.failure(description, shouldBeLowerCase(actual));
    }
  }
public void assertLowerCase(Description description, Character actual) {
    assertNotNull(description, actual);
    if (!isLowerCase(actual)) {
      throw failures.failure(description, shouldBeLowerCase(actual));
    }
  }
Asserts that the actual value is a lowercase character.

@param description contains information about the assertion.
@param actual the actual value.
@throws AssertionError if the actual value is {@code null}.
@throws AssertionError if the actual value is not a lowercase character.