### Question:
ImmutableElectricObject { public Variable getVar(Variable.Key key) { int varIndex = searchVar(key); return varIndex >= 0 ? vars[varIndex] : null; } ImmutableElectricObject(Variable[] vars, int flags); Variable getVar(Variable.Key key); T getVarValue(Variable.Key key, Class type); Iterator<Variable> getVariables(); Variable[] toVariableArray(); int getNumVariables(); Variable getVar(int varIndex); int searchVar(Variable.Key key); abstract int hashCodeExceptVariables(); abstract boolean equalsExceptVariables(ImmutableElectricObject o); boolean equalsVariables(ImmutableElectricObject o); final int flags; }### Answer:
@Test public void testGetVar() { System.out.println("getVar"); assertNull(obj_Aa.getVar(Variable.newKey("B"))); assertSame(ATTR_A_F, obj_Aa.getVar(Variable.newKey("ATTR_A"))); assertSame(a_foo, obj_Aa.getVar(Variable.newKey("a"))); }