public void setDefinition(DefinitionDocument definition) {
        this.definition = definition;
    }
<p>
The <code>DefinitionDocument</code> that contains the updated system definition.
</p>

@param definition
       The <code>DefinitionDocument</code> that contains the updated system definition.
aws-java-sdk-iotthingsgraph/src/main/java/com/amazonaws/services/iotthingsgraph/model/UpdateSystemTemplateRequest.java