is
If the in the configuration specified modpack dir is an existing directory, checks are made for valid configuration of: directories to copy to server pack, if includeServerInstallation is true path to Java executable/binary, Minecraft version, modloader and modloader version.
Return
true if an error is found during configuration check.
Author
Griefed
Parameters
pack
An instance of PackConfig which contains the configuration of the modpack.
config
Contains all encountered errors during the check of the passed configuration.