public Patch withEpoch(Integer epoch) {
        setEpoch(epoch);
        return this;
    }
<p>
The epoch of the patch. For example in <code>pkg-example-EE-20180914-2.2.amzn1.noarch</code>, the epoch value is
<code>20180914-2</code>. Applies to Linux-based managed nodes only.
</p>

@param epoch
       The epoch of the patch. For example in <code>pkg-example-EE-20180914-2.2.amzn1.noarch</code>, the epoch
       value is <code>20180914-2</code>. Applies to Linux-based managed nodes only.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ssm/src/main/java/com/amazonaws/services/simplesystemsmanagement/model/Patch.java