owlcub-academy/node_modules/@aws-sdk/middleware-flexible-checksums/dist-es/hasHeader.js

export const hasHeader = (header, headers) => {
    const soughtHeader = header.toLowerCase();
    for (const headerName of Object.keys(headers)) {
        if (soughtHeader === headerName.toLowerCase()) {
            return true;
        }
    }
    return false;
};