This is a wrapper function that calls all the necessary functions to detect missing annotation packages, ensure all versions are compatible with the current version of annaffy,and download required packages. This is an internal function and should not be called by the end user.
The chip-level annotation package
This function checks for the correct chip-level package, and if it is not installed will download and install. In the case that there are two versions of the same package installed, the function will return the library location of the package with the correct version.
This function doesn't return anything; it is only called for its side effect of loading or installing a chip-level annotation package.
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