applyToBuffer method
Implementation
@override
void applyToBuffer(PgByteDataWriter buffer) {
// Length of message contents in bytes, including self.
buffer.writeInt32(16);
// The cancel request code. The value is chosen to contain 1234 in the most significant 16 bits,
// and 5678 in the least significant 16 bits.
// (To avoid confusion, this code must not be the same as any protocol version number.)
buffer.writeInt32(80877102);
buffer.writeUint32(processId);
buffer.writeUint32(secretKey);
}