@Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        if (getCertificateIdentifier() != null)
            sb.append("CertificateIdentifier: ").append(getCertificateIdentifier()).append(",");
        if (getCertificateType() != null)
            sb.append("CertificateType: ").append(getCertificateType()).append(",");
        if (getThumbprint() != null)
            sb.append("Thumbprint: ").append(getThumbprint()).append(",");
        if (getValidFrom() != null)
            sb.append("ValidFrom: ").append(getValidFrom()).append(",");
        if (getValidTill() != null)
            sb.append("ValidTill: ").append(getValidTill()).append(",");
        if (getCertificateArn() != null)
            sb.append("CertificateArn: ").append(getCertificateArn());
        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-docdb/src/main/java/com/amazonaws/services/docdb/model/Certificate.java