### Question:
DealUser { public DealUser displayName(String displayName) { this.displayName = displayName; return this; }  DealUser displayName(String displayName); @javax.annotation.Nullable @ApiModelProperty(example = "フリー太郎", value = "表示名") String getDisplayName(); void setDisplayName(String displayName); DealUser email(String email); @ApiModelProperty(example = "contact@example.com", required = true, value = "メールアドレス") String getEmail(); void setEmail(String email); DealUser id(Integer id); @ApiModelProperty(example = "1", required = true, value = "ユーザーID") Integer getId(); void setId(Integer id); @Override boolean equals(java.lang.Object o); @Override int hashCode(); @Override String toString(); static final String SERIALIZED_NAME_DISPLAY_NAME; static final String SERIALIZED_NAME_EMAIL; static final String SERIALIZED_NAME_ID; }### Answer:
@Test public void displayNameTest() { }