src/main/java/com/microsoft/store/partnercenter/productupgrades/ProductUpgradeCollectionOperations.java [53:67]:
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    public ProductUpgradeEligibility checkEligibility(ProductUpgradeRequest productUpgradeRequest)
    {
		if (productUpgradeRequest == null)
		{
			throw new IllegalArgumentException("The productUpgradeRequest parameter cannot be null.");
		}

		return this.getPartner().getServiceClient().post(
			this.getPartner(), 
			new TypeReference<ProductUpgradeEligibility>(){},
			MessageFormat.format(
				PartnerService.getInstance().getConfiguration().getApis().get("GetProductUpgradeEligibility").getPath(),
				this.getContext()),
            productUpgradeRequest);
    }
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src/main/java/com/microsoft/store/partnercenter/productupgrades/ProductUpgradeOperations.java [39:53]:
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    public ProductUpgradeStatus checkStatus(ProductUpgradeRequest productUpgradeRequest)
    {
        if (productUpgradeRequest == null)
		{
			throw new IllegalArgumentException("The productUpgradeRequest parameter cannot be null.");
		}

		return this.getPartner().getServiceClient().post(
			this.getPartner(), 
			new TypeReference<ProductUpgradeStatus>(){},
			MessageFormat.format(
				PartnerService.getInstance().getConfiguration().getApis().get("GetProductUpgradeStatus").getPath(),
				this.getContext()),
                productUpgradeRequest);   
    }
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