public String getCacheControl() {
        return cacheControl;
    }
Returns the cache control response header override if it has been
specified, or null otherwise.

@return Returns the cache control response header override if it has been
        specified, or null otherwise.
@see ResponseHeaderOverrides#RESPONSE_HEADER_CACHE_CONTROL
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/ResponseHeaderOverrides.java