public java.util.List<String> getSupportedMessagingContentTypes() {
        return supportedMessagingContentTypes;
    }
<p>
The supported chat message content types. Supported types are <code>text/plain</code>, <code>text/markdown</code>, <code>application/json</code>, <code>application/vnd.amazonaws.connect.message.interactive</code>, and
<code>application/vnd.amazonaws.connect.message.interactive.response</code>.
</p>
<p>
Content types must always contain <code>text/plain</code>. You can then put any other supported type in the list.
For example, all the following lists are valid because they contain <code>text/plain</code>:
<code>[text/plain, text/markdown, application/json]</code>, <code>[text/markdown, text/plain]</code>,
<code>[text/plain, application/json, application/vnd.amazonaws.connect.message.interactive.response]</code>.
</p>
<note>
<p>
The type <code>application/vnd.amazonaws.connect.message.interactive</code> is required to use the <a
href="https://docs.aws.amazon.com/connect/latest/adminguide/show-view-block.html">Show view</a> flow block.
</p>
</note>

@return The supported chat message content types. Supported types are <code>text/plain</code>,
        <code>text/markdown</code>, <code>application/json</code>,
        <code>application/vnd.amazonaws.connect.message.interactive</code>, and
        <code>application/vnd.amazonaws.connect.message.interactive.response</code>. </p>
        <p>
        Content types must always contain <code>text/plain</code>. You can then put any other supported type in
        the list. For example, all the following lists are valid because they contain <code>text/plain</code>:
        <code>[text/plain, text/markdown, application/json]</code>, <code>[text/markdown, text/plain]</code>,
        <code>[text/plain, application/json, application/vnd.amazonaws.connect.message.interactive.response]</code>
        .
        </p>
        <note>
        <p>
        The type <code>application/vnd.amazonaws.connect.message.interactive</code> is required to use the <a
        href="https://docs.aws.amazon.com/connect/latest/adminguide/show-view-block.html">Show view</a> flow
        block.
        </p>
aws-java-sdk-connect/src/main/java/com/amazonaws/services/connect/model/StartChatContactRequest.java