Building Hierarchy of Products

/**
 * The below method accepts parent productname and list of option child products and categoryhierarchy name as input and return true or false as status of the build.
*/
public Boolean buildHierarchy(String parentProductName, List<String> optionProducts, String categoryHierarchyName) 
{
	Apttus_Config2.CPQAdminStruct.HierarchyDO hierDO = new Apttus_Config2.CPQAdminStruct.HierarchyDO();
	Apttus_Config2.CPQAdminStruct.HierarchyRequestDO hierRequest = new Apttus_Config2.CPQAdminStruct.HierarchyRequestDO();
	Apttus_Config2.CPQAdminStruct.HierarchyResponseDO hierResponse;
	List< Apttus_Config2__ProductOptionComponent__c> poc;

	// STEP 1 - Get bundle product and options
	Product2 bundleProduct = [SELECT Id, Name 
			            	  FROM Product2 
			            	  WHERE Name = :parentProductName
			            	  LIMIT 1];
	Product2 options = [SELECT Id, Name 
						FROM Product2 
						WHERE Name IN : optionProducts];

	// STEP 2 - Get an option group to create a bundle with the 3 options from above
	Apttus_Config2__ ClassificationHierarchy__c optionGroup = [SELECT Id, Name 
					    									   FROM Apttus_Config2__ ClassificationHierarchy__c 
					   										   WHERE Name = :categoryHierarchyName
					    									   LIMIT 1];

	// STEP 3 - Create Bundle by associating Option Group and Product
	hierRequest.ProductId = bundleProduct.Id;
	hierRequest.OptionGroupIds.add(optionGroup.Id);

	// send request and save response
	hierResponse = Apttus_Config2.CPQAdminWebService.buildHierarchy(hierRequest);
	
	// STEP 4 - Add options to the newly created bundle
	hierRequest = new Apttus_Config2.CPQAdminStruct.HierarchyRequestDO();
	hierRequest.ProductId = bundleProduct.Id;
	hierRequest.OptionGroupId = pog[0].Id;
	for (Product2 option : options) {
		hierRequest.ProductIds.add(option.Id);
	}
	hierResponse = Apttus_Config2.CPQAdminWebService.buildHierarchy(hierRequest);
	
	return hierResponse.Success;
}