### Question:
ActionFlowStepConfig { @Override public String toString() { StringBuilder sb = new StringBuilder(); sb.append("{ActionFlowStepConfig "); sb.append("index:").append(index).append(", "); sb.append("nextAction:").append(nextAction).append(", "); sb.append("prevAction:").append(prevAction); sb.append("}"); return sb.toString(); } protected  ActionFlowStepConfig(ActionFlowStepConfig orig); protected  ActionFlowStepConfig(int index, String nextAction,
            String prevAction); int getIndex(); String getNextAction(); String getPrevAction(); @Override boolean equals(Object o); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void testToString() throws Exception { ActionFlowStepConfig.Builder stepConfigBuilder = new ActionFlowStepConfig.Builder( 0, "next", "prev"); ActionFlowStepConfig stepConfig = stepConfigBuilder.build(); Assert.assertEquals( "{ActionFlowStepConfig index:0, nextAction:next, prevAction:prev}", stepConfig.toString()); }