public String build() throws IllegalStateException {
		validate();
		elements[DEPLOYMENT_DESC] = String.format("%s.%s.%s.%s", deploymentDesc[MODULE_TYPE],
				deploymentDesc[MODULE_LABEL], deploymentDesc[MODULE_SEQUENCE], deploymentDesc[CONTAINER]);
		return Paths.build(elements);
	}
Build the path string using the field values.

@return path string
@throws java.lang.IllegalStateException if there are missing fields
@see Paths#build
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/core/StreamDeploymentsPath.java