Comet parameter: minimum_peaks
         
         - An integer value indicating the minimum number of m/z-intensity pairs
         that must be present in a spectrum before it is searched.
         
- This parameter can be used to avoid searching nearly sparse spectra
         that will not likely yield an indentification.
         
- This parameter is checked against the spectrum after
         clear_mz_range is applied but before
         any other spectral processing occurs (i.e.  remove_precursor_peak).
         
- Valid values are any integer number.
         
- The default value is "10" if this parameter is missing.
         
Example:
         
minimum_peaks = 10