Confusion over query/execute's return type union via Promise API

Upon console logging an INSERT, I can see the following:

ResultSetHeader {
    fieldCount: 0,
    affectedRows: 1,
    insertId: 0,
    info: '',
    serverStatus: 2,
    warningStatus: 1 }

This would imply that there's a warning. What return packet type would contain this information?

The signature for .query is RowDataPacket[][] | RowDataPacket[] | OkPacket | OkPacket[], and since this is an INSERT I'd expect the result to be an OkPacket if anything, however the OkPacket type definition is:

OkPacket {
    constructor: {
        name: 'OkPacket'
    };
    fieldCount: number;
    affectedRows: number;
    changedRows: number;
    insertId: number;
    serverStatus: number;
    warningCount: number;
    message: string;
    procotol41: boolean;
}

Observations:

warningStatus vs warningCount
procotol41 (odd spelling, can't find any reference to this elsewhere)

So unless I typecast as any I don't believe I can determine if a query has had a warning, but I'd just like to confirm if this is the case and raise this just in case there is indeed an issue in the definition.

types / mysql2

Confusion over query/execute's return type union via Promise API #24