### Question:
KeyExpandRequest { public KeyExpandRequest key(String key) { this.key = key; return this; }  KeyExpandRequest action(ActionEnum action); @ApiModelProperty(value = "") ActionEnum getAction(); void setAction(ActionEnum action); KeyExpandRequest key(String key); @ApiModelProperty(example = "3068BB1CA04525BB0E416C485FE6A67FD52540227D267CC8B6E8DA958A7FA039", value = "") String getKey(); void setKey(String key); @Override boolean equals(java.lang.Object o); @Override int hashCode(); @Override String toString(); static final String SERIALIZED_NAME_ACTION; static final String SERIALIZED_NAME_KEY; }### Answer:
@Test public void keyTest() { }