### Question:
SecurityRule implements Serializable { public void setGroupname(String groupname) { this.groupname = groupname; }  @PreUpdate @PrePersist void onPreUpdate(); @XmlTransient Long getId(); void setId(Long id); @XmlTransient Resource getResource(); void setResource(Resource resource); @XmlTransient User getUser(); void setUser(User user); @XmlTransient UserGroup getGroup(); void setGroup(UserGroup group); String getUsername(); void setUsername(String username); String getGroupname(); void setGroupname(String groupname); @XmlTransient boolean isCanRead(); void setCanRead(boolean canRead); @XmlTransient boolean isCanWrite(); void setCanWrite(boolean canWrite); @Override String toString(); @Override int hashCode(); @Override boolean equals(Object obj);  }### Answer:
@Test public void testMarshallingGroupname() throws Exception { SecurityRule sr0 = new SecurityRule(); sr0.setGroupname("testgroup"); doTheTest(sr0); }