12.0.742.16 dev-m (dev-m)
dev => Development
m ==> Multiple-Install, Multi-Installation
// Return a human readable modifier for the version string, e.g.
// the channel (dev, beta, stable). Returns true if this operation succeeded,
// on success, channel contains one of "", "unknown", "dev" or "beta" (unless
// it is a multi-install product, in which case it will return "m",
// "unknown-m", "dev-m", or "beta-m").