src/utils/arraybuffer.js
function enforceString(b, encoding) {
    if (is.string(b)) return b;
    if (isArrayBuffer(b)) b = toBuffer(b);

    return b.toString(encoding);
}
function enforceString(b, encoding) {
    if (is.string(b)) return b;
    if (isArrayBuffer(b)) b = toBuffer(b);

    return b.toString(encoding);
}
Force conversion to string with specific encoding