public GetIdentityMailFromDomainAttributesResult addMailFromDomainAttributesEntry(String key, IdentityMailFromDomainAttributes value) {
        if (null == this.mailFromDomainAttributes) {
            this.mailFromDomainAttributes = new com.amazonaws.internal.SdkInternalMap<String, IdentityMailFromDomainAttributes>();
        }
        if (this.mailFromDomainAttributes.containsKey(key))
            throw new IllegalArgumentException("Duplicated keys (" + key.toString() + ") are provided.");
        this.mailFromDomainAttributes.put(key, value);
        return this;
    }
Add a single MailFromDomainAttributes entry

@see GetIdentityMailFromDomainAttributesResult#withMailFromDomainAttributes
@returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ses/src/main/java/com/amazonaws/services/simpleemail/model/GetIdentityMailFromDomainAttributesResult.java