}
            if (name.startsWith(OVERRIDE_PREFIX)) {
                String overrideName = name.substring(OVERRIDE_PREFIX.length());
                props.put(overrideName, substVars(value, name, props, callback));
            } else {
                props.put(name, substVars(value, name, props, callback));
            }
        }
        props.keySet().removeIf(k -> k.startsWith(OVERRIDE_PREFIX));
    }

            if (pos == current) {
                newClientMap.put(Pattern.compile(regex), client);
                added = true;
            }
            newClientMap.put(entry.getKey(), entry.getValue());
            current++;
        }
        if (!added) {
            newClientMap.put(Pattern.compile(regex), client);
        }
        clientMap = newClientMap;
    }

    /**

    assertMethodPermitsRequestBody("DELETE")
    assertMethodForbidsRequestBody("HEAD")
    assertMethodPermitsRequestBody("OPTIONS")
    assertMethodPermitsRequestBody("POST")
    assertMethodPermitsRequestBody("PUT")
    assertMethodPermitsRequestBody("TRACE")
    assertMethodPermitsRequestBody("PATCH")
    assertMethodPermitsNoRequestBody("GET")
    assertMethodPermitsNoRequestBody("DELETE")

    original.put(1, "foo", 'a');
    assertEquals((Character) 'a', transpose.get("foo", 1));
  }

  public void testPutTransposeModifiesOriginal() {
    Table<Integer, String, Character> original = HashBasedTable.create();
    Table<String, Integer, Character> transpose = transpose(original);
    transpose.put("foo", 1, 'a');
    assertEquals((Character) 'a', original.get(1, "foo"));

  }

  @Override
  protected Map<String, Map<Integer, Character>> makePopulatedMap() {
    RowSortedTable<Integer, String, Character> table = TreeBasedTable.create();
    table.put(1, "foo", 'a');
    table.put(1, "bar", 'b');
    table.put(3, "foo", 'c');
    return unmodifiableRowSortedTable(table).columnMap();
  }

  }

  @Override
  protected Map<String, Map<Integer, Character>> makePopulatedMap() {
    Table<String, Integer, Character> table = HashBasedTable.create();
    table.put("foo", 1, 'a');
    table.put("bar", 1, 'b');
    table.put("foo", 3, 'c');
    return unmodifiableTable(table).rowMap();
  }

    super(false, true, true, true, true);
  }

  @Override
  protected SortedMap<String, Integer> makePopulatedMap() {
    NavigableMap<String, Integer> map = new SafeTreeMap<>();
    map.put("one", 1);
    map.put("two", 2);
    map.put("three", 3);
    return SerializableTester.reserialize(map);
  }

  @Override
  protected SortedMap<String, Integer> makeEmptyMap() throws UnsupportedOperationException {

  }

  @Override
  protected Map<String, String> makePopulatedMap() {
    Map<String, Integer> underlying = new HashMap<>();
    underlying.put("a", 1);
    underlying.put("b", 2);
    underlying.put("c", 3);
    return transformValues(underlying, Functions.toStringFunction());
  }

  }

  @Override
  protected Map<String, Map<Integer, Character>> makePopulatedMap() {
    Table<String, Integer, String> table = HashBasedTable.create();
    table.put("foo", 1, "apple");
    table.put("bar", 1, "banana");
    table.put("foo", 3, "cat");
    return transformValues(table, TableCollectionTest.FIRST_CHARACTER).rowMap();
  }

  }

  @Override
  protected Map<String, Map<Integer, Character>> makePopulatedMap() {
    Table<Integer, String, Character> table = HashBasedTable.create();
    table.put(1, "foo", 'a');
    table.put(1, "bar", 'b');
    table.put(3, "foo", 'c');
    return unmodifiableTable(table).columnMap();
  }