public String getCustomerIdentifier() {
        return this.customerIdentifier;
    }
<p>
The <code>CustomerIdentifier</code> is used to identify an individual customer in your application. Calls to
<code>BatchMeterUsage</code> require <code>CustomerIdentifiers</code> for each <code>UsageRecord</code>.
</p>

@return The <code>CustomerIdentifier</code> is used to identify an individual customer in your application. Calls
        to <code>BatchMeterUsage</code> require <code>CustomerIdentifiers</code> for each
        <code>UsageRecord</code>.
aws-java-sdk-marketplacemeteringservice/src/main/java/com/amazonaws/services/marketplacemetering/model/ResolveCustomerResult.java