public void setInstanceName(String instanceName) {
        this.instanceName = instanceName;
    }
<p>
The unique name of the source instance (<code>Amazon_Linux-512MB-Virginia-1</code>). When this is defined, a
snapshot of the instance's system volume is created.
</p>
<note>
<p>
This parameter cannot be defined together with the <code>disk name</code> parameter. The
<code>instance name</code> and <code>disk name</code> parameters are mutually exclusive.
</p>
</note>

@param instanceName
       The unique name of the source instance (<code>Amazon_Linux-512MB-Virginia-1</code>). When this is defined,
       a snapshot of the instance's system volume is created.</p> <note>
       <p>
       This parameter cannot be defined together with the <code>disk name</code> parameter. The
       <code>instance name</code> and <code>disk name</code> parameters are mutually exclusive.
       </p>
aws-java-sdk-lightsail/src/main/java/com/amazonaws/services/lightsail/model/CreateDiskSnapshotRequest.java