static void setDefaultBufferAllocator(BufferAllocator bufferAllocator) {
        defaultBufferAllocator = bufferAllocator;
    }
Configures the default {@link BufferAllocator} to be used by all future
{@link SSLEngine} and {@link ConscryptEngineSocket} instances from this provider.
common/src/main/java/org/conscrypt/ConscryptEngine.java