* @return True if the password was successfully changed in all chains, false otherwise.
     */
    public boolean changePassword(final String username, final String password) {
        return chains().get(stream -> stream.allMatch(c -> c.changePassword(username, password)));
    }

    /**
     * Deletes a user from all authentication chains.
     * @param user The user to delete.
     */
    public void delete(final User user) {

     */
    protected boolean isEmptyArray(final String[] values) {
        if (values == null || values.length == 0) {
            return true;
        }
        return stream(values).get(stream -> stream.allMatch(StringUtil::isBlank));
    }

    /**
     * Simplifies the array.
     *
     * @param values The array.
     * @return The simplified array.
     */

                    }
                }
                if (logger.isDebugEnabled()) {
                    logger.debug("generator path: {}", s);
                }
                return s;
            }).allMatch(s -> {
                final boolean found = new File(s).isFile();
                if (found && logger.isDebugEnabled()) {
                    logger.debug("Generator command found: {}", s);
                }

        ArgumentCaptor<Integer> lenCap = ArgumentCaptor.forClass(Integer.class);
        verify(raf, atLeast(2)).write(any(byte[].class), anyInt(), lenCap.capture());
        assertTrue(lenCap.getAllValues().stream().allMatch(len -> len == 1));
    }

    @Test
    @DisplayName("write(short/char/int/long/float/double): correct byte lengths")
    void write_multiByteVariants_lengths() throws Exception {

            propMap.put(SUGGEST_SEARCH_LOG_PERMISSIONS, validPermissionList);
        }
        final List<String> list = validPermissionList;
        return stream(permissions).get(stream -> stream.allMatch(v -> list.contains(v)));
    }

    String getRoleSearchUserPrefix();

    String getRoleSearchGuestPermissions();

    default List<String> getSearchGuestRoleList() {