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CRAN test NOTE: Uses the superseded package: 'doSNOW'. Comment: We use 'doSNOW' because we want to print computation progress via the 'progress' package in a parallelized for-loop and there seems to be no alternative at the moment.
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CRAN test NOTE: Found the following (possibly) invalid URLs: URL: https://finance.yahoo.com. Comment: We have no problems to access this URL.