PayPalDataCollector/src/main/java/com/paypal/android/sdk/data/collector/PayPalDataCollector.java
@MainThread
    public static String getClientMetadataId(Context context) {
        PayPalDataCollectorRequest request = new PayPalDataCollectorRequest()
                .setApplicationGuid(InstallationIdentifier.getInstallationGUID(context));

        return getClientMetadataId(context, request);
    }
@MainThread
    public static String getClientMetadataId(Context context) {
        PayPalDataCollectorRequest request = new PayPalDataCollectorRequest()
                .setApplicationGuid(InstallationIdentifier.getInstallationGUID(context));

        return getClientMetadataId(context, request);
    }
@ MainThread public static String getClientMetadataId ( Context context ) { PayPalDataCollectorRequest request = new PayPalDataCollectorRequest ( ) . setApplicationGuid ( InstallationIdentifier . getInstallationGUID ( context ) ) ; return getClientMetadataId ( context , request ) ; }
Gets a Client Metadata ID at the time of payment activity. Once a user initiates a PayPal payment
from their device, PayPal uses the Client Metadata ID to verify that the payment is
originating from a valid, user-consented device and application. This helps reduce fraud and
decrease declines. This method MUST be called prior to initiating a pre-consented payment (a
"future payment") from a mobile device. Pass the result to your server, to include in the
payment request sent to PayPal. Do not otherwise cache or store this value.

@param context
@return clientMetadataId Your server will send this to PayPal
Gets a Client Metadata ID at the time of payment activity . Once a user initiates a PayPal payment from their device PayPal uses the Client Metadata ID to verify that the payment is originating from a valid user - consented device and application . This helps reduce fraud and decrease declines . This method MUST be called prior to initiating a pre - consented payment ( a future payment ) from a mobile device . Pass the result to your server to include in the payment request sent to PayPal . Do not otherwise cache or store this value .