| write_message | R Documentation | 
Small function to write to message and to log file.
write_message(message_str, log_file = NULL)
| message_str | A string to write as a message. | 
| log_file | A log filename. | 
A message and writes the message to the specified log file.
write_message(message_str = "Finished Step 1", log_file = "log.file.txt")
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