public Communication withAttachmentSet(AttachmentDetails... attachmentSet) {
        if (this.attachmentSet == null) {
            setAttachmentSet(new com.amazonaws.internal.SdkInternalList<AttachmentDetails>(attachmentSet.length));
        }
        for (AttachmentDetails ele : attachmentSet) {
            this.attachmentSet.add(ele);
        }
        return this;
    }
<p>
Information about the attachments to the case communication.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setAttachmentSet(java.util.Collection)} or {@link #withAttachmentSet(java.util.Collection)} if you want
to override the existing values.
</p>

@param attachmentSet
       Information about the attachments to the case communication.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-support/src/main/java/com/amazonaws/services/support/model/Communication.java