@Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        if (getResourceIdentifier() != null)
            sb.append("ResourceIdentifier: ").append(getResourceIdentifier()).append(",");
        if (getApplyAction() != null)
            sb.append("ApplyAction: ").append(getApplyAction()).append(",");
        if (getOptInType() != null)
            sb.append("OptInType: ").append(getOptInType());
        sb.append("}");
        return sb.toString();
    }
Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be
redacted from this string using a placeholder value.

@return A string representation of this object.

@see java.lang.Object#toString()
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/ApplyPendingMaintenanceActionRequest.java