return sumOfSquaresOfDeltas;
  }

  /**
   * Returns the <a href="http://en.wikipedia.org/wiki/Arithmetic_mean">arithmetic mean</a> of the
   * values. The count must be non-zero.
   *
   * <p>The definition of the mean is the same as {@link Stats#mean}.
   *
   * @param values a series of values, which will be converted to {@code double} values (this may
   *     cause loss of precision)

 */
public class BsUserInfo extends EsAbstractEntity {

    // ===================================================================================
    //                                                                          Definition
    //                                                                          ==========
    private static final long serialVersionUID = 1L;

public class BsElevateWordToLabel extends EsAbstractEntity {

    // ===================================================================================
    //                                                                          Definition
    //                                                                          ==========
    private static final long serialVersionUID = 1L;

    # o additionalUserMap: (NotRequired - Default map:{})
    #  You can set additional users.
    #  Elements of this map are as below:
    #   o key of map: User Definition Name (userDefName)
    #   o url: (NotRequired - Default same as one of main schema)
    #   o schema: (NotRequired - Default treated as no schema setting)
    #   o user: (Required)

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

### OpenAPI

**FastAPI** génère un "schéma" contenant toute votre API dans le standard de définition d'API **OpenAPI**.

#### "Schéma"

Un "schéma" est une définition ou une description de quelque chose. Pas le code qui l'implémente, uniquement une description abstraite.

#### "Schéma" d'API

      "Legal Entity" shall mean the union of the acting entity and all
      other entities that control, are controlled by, or are under common
      control with that entity. For the purposes of this definition,
      "control" means (i) the power, direct or indirect, to cause the
      direction or management of such entity, whether by contract or
      otherwise, or (ii) ownership of fifty percent (50%) or more of the

public class TestmailPostcard extends LaTypicalPostcard {

    // ===================================================================================
    //                                                                          Definition
    //                                                                          ==========
    public static final String PATH = "testmail.dfmail";

    // ===================================================================================
    //                                                                          Definition
    //                                                                          ==========
    /** The serial version UID for object serialization. (Default) */
    private static final long serialVersionUID = 1L;

public class BsFavoriteLog extends EsAbstractEntity {

    // ===================================================================================
    //                                                                          Definition
    //                                                                          ==========
    private static final long serialVersionUID = 1L;

public class EsStatusPostcard extends LaTypicalPostcard {

    // ===================================================================================
    //                                                                          Definition
    //                                                                          ==========
    public static final String PATH = "es_status.dfmail";