public void setPreload(Boolean preload) {
        this.preload = preload;
    }
<p>
A Boolean that determines whether CloudFront includes the <code>preload</code> directive in the
<code>Strict-Transport-Security</code> HTTP response header.
</p>

@param preload
       A Boolean that determines whether CloudFront includes the <code>preload</code> directive in the
       <code>Strict-Transport-Security</code> HTTP response header.
aws-java-sdk-cloudfront/src/main/java/com/amazonaws/services/cloudfront/model/ResponseHeadersPolicyStrictTransportSecurity.java