Function prepare

prepare<FD extends FieldDefinition>(
definition: MessageDefinition<FD>,
message: Message<FD>,
): Buffer
Prepare a message as a ISO buffer before sending it to the ISO capable server/client
Type Parameters
- FD extends FieldDefinition
Parameters
- definition: MessageDefinition<FD>
  an object that will constrain the type of the fields that can be used. It will be used while preparing the buffer
- message: Message<FD>
  the message that we want to write in an ISO format
Returns Buffer
a buffer to the ISO message
Example
```
const iso = Buffer.from("0100ca......", "hex");
const message = parse(isoDefinition, buffer);
message.content[2] = "576aze45623";
const newIso = prepare(isoDefinition, message);
```
- Defined in lib/message.ts:136