### Question:
WorkGenerateRequest { public WorkGenerateRequest difficulty(String difficulty) { this.difficulty = difficulty; return this; }  WorkGenerateRequest action(ActionEnum action); @ApiModelProperty(value = "") ActionEnum getAction(); void setAction(ActionEnum action); WorkGenerateRequest hash(String hash); @ApiModelProperty(example = "8D3AB98B301224253750D448B4BD997132400CEDD0A8432F775724F2D9821C72", value = "") String getHash(); void setHash(String hash); WorkGenerateRequest difficulty(String difficulty); @ApiModelProperty(example = "ffffffd21c3933f3", value = "") String getDifficulty(); void setDifficulty(String difficulty); @Override boolean equals(java.lang.Object o); @Override int hashCode(); @Override String toString(); static final String SERIALIZED_NAME_ACTION; static final String SERIALIZED_NAME_HASH; static final String SERIALIZED_NAME_DIFFICULTY; }### Answer:
@Test public void difficultyTest() { }