### Question:
NetShellConfiguration extends PersistentObject { public final synchronized void setGlobal(GlobalConfiguration global) { if (this.global == null) { this.global = global; this.getGlobal().readOnly(); } } NetShellConfiguration(boolean canSet);  NetShellConfiguration(); static NetShellConfiguration getInstance(); GlobalConfiguration getGlobal(); final synchronized void setGlobal(GlobalConfiguration global); void save(File file); @JsonIgnore
    static String DEFAULT_FILENAME; }### Answer:
@Test public void testSetGlobal() throws Exception { }