IMMEDIATE_WITH_TIME_PRORATION constant
int
const IMMEDIATE_WITH_TIME_PRORATION
Replacement takes effect immediately, and the remaining time will be prorated and credited to the user. This is the current default behavior. https://developer.android.com/reference/com/android/billingclient/api/BillingFlowParams.ProrationMode#immediate_with_time_proration
Implementation
static const int IMMEDIATE_WITH_TIME_PRORATION = 1;