### Question:
ManualJournal { public ManualJournal txnNumber(String txnNumber) { this.txnNumber = txnNumber; return this; }  ManualJournal adjustment(Boolean adjustment); @ApiModelProperty(example = "false", required = true, value = "決算整理仕訳フラグ（falseまたは未指定の場合: 日常仕訳）") Boolean getAdjustment(); void setAdjustment(Boolean adjustment); ManualJournal companyId(Integer companyId); @ApiModelProperty(example = "1", required = true, value = "事業所ID") Integer getCompanyId(); void setCompanyId(Integer companyId); ManualJournal details(List<ManualJournalDetails> details); ManualJournal addDetailsItem(ManualJournalDetails detailsItem); @ApiModelProperty(required = true, value = "貸借行一覧（配列）: 貸借合わせて100行まで登録できます。") List<ManualJournalDetails> getDetails(); void setDetails(List<ManualJournalDetails> details); ManualJournal id(Integer id); @ApiModelProperty(example = "1", required = true, value = "振替伝票ID") Integer getId(); void setId(Integer id); ManualJournal issueDate(String issueDate); @ApiModelProperty(example = "2018-01-01", required = true, value = "発生日 (yyyy-mm-dd)") String getIssueDate(); void setIssueDate(String issueDate); ManualJournal txnNumber(String txnNumber); @javax.annotation.Nullable @ApiModelProperty(example = "2CX05", required = true, value = "仕訳番号") String getTxnNumber(); void setTxnNumber(String txnNumber); @Override boolean equals(java.lang.Object o); @Override int hashCode(); @Override String toString(); static final String SERIALIZED_NAME_ADJUSTMENT; static final String SERIALIZED_NAME_COMPANY_ID; static final String SERIALIZED_NAME_DETAILS; static final String SERIALIZED_NAME_ID; static final String SERIALIZED_NAME_ISSUE_DATE; static final String SERIALIZED_NAME_TXN_NUMBER; }### Answer:
@Test public void txnNumberTest() { }