public ModifyUserRequest withAppendAccessString(String appendAccessString) {
        setAppendAccessString(appendAccessString);
        return this;
    }
<p>
Adds additional user permissions to the access string.
</p>

@param appendAccessString
       Adds additional user permissions to the access string.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-elasticache/src/main/java/com/amazonaws/services/elasticache/model/ModifyUserRequest.java