Review

class BooleanUtils {
    /**
     * <p>Checks if a <code>Boolean</code> value is <i>not</i> <code>true</code>,
     * handling <code>null</code> by returning <code>true</code>.</p>
     *
     * <pre>
     *   BooleanUtils.isNotTrue(Boolean.TRUE)  = false
     *   BooleanUtils.isNotTrue(Boolean.FALSE) = true
     *   BooleanUtils.isNotTrue(null)          = true
     * </pre>
     *
     * @param bool  the boolean to check, null returns <code>true</code>
     * @return <code>true</code> if the input is null or false
     * @since 2.3
     */
    public static boolean isNotTrue(Boolean bool) {
        return !isTrue(bool);
    }

}