private boolean hasPartitionKeyProperty(ModuleDeploymentProperties properties) {
		return (properties.containsKey("producer.partitionKeyExpression")
				|| properties.containsKey("producer.partitionKeyExtractorClass"));
	}
Return {@code true} if the provided properties include a property
used to extract a partition key.

@param properties properties to examine for a partition key property
@return true if the properties contain a partition key property
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/server/admin/deployment/StreamRuntimePropertiesProvider.java