public EncryptionConfiguration withKmsKeyId(String kmsKeyId) {
        setKmsKeyId(kmsKeyId);
        return this;
    }
<p>
An alias, alias ARN, key ID, or key ARN of a symmetric encryption KMS key to encrypt data. To specify a KMS key
in a different Amazon Web Services account, you must use the key ARN or alias ARN.
</p>

@param kmsKeyId
       An alias, alias ARN, key ID, or key ARN of a symmetric encryption KMS key to encrypt data. To specify a
       KMS key in a different Amazon Web Services account, you must use the key ARN or alias ARN.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-stepfunctions/src/main/java/com/amazonaws/services/stepfunctions/model/EncryptionConfiguration.java