@Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;

        if (obj instanceof UpgradeHistory == false)
            return false;
        UpgradeHistory other = (UpgradeHistory) obj;
        if (other.getUpgradeName() == null ^ this.getUpgradeName() == null)
            return false;
        if (other.getUpgradeName() != null && other.getUpgradeName().equals(this.getUpgradeName()) == false)
            return false;
        if (other.getStartTimestamp() == null ^ this.getStartTimestamp() == null)
            return false;
        if (other.getStartTimestamp() != null && other.getStartTimestamp().equals(this.getStartTimestamp()) == false)
            return false;
        if (other.getUpgradeStatus() == null ^ this.getUpgradeStatus() == null)
            return false;
        if (other.getUpgradeStatus() != null && other.getUpgradeStatus().equals(this.getUpgradeStatus()) == false)
            return false;
        if (other.getStepsList() == null ^ this.getStepsList() == null)
            return false;
        if (other.getStepsList() != null && other.getStepsList().equals(this.getStepsList()) == false)
            return false;
        return true;
    }
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-opensearch/src/main/java/com/amazonaws/services/opensearch/model/UpgradeHistory.java