def maskRegions(self, regions, verbose=False):
if verbose:<EOL><INDENT>pind = ProgressIndicator(totalToDo=len(regions),<EOL>messagePrefix="<STR_LIT>",<EOL>messageSuffix="<STR_LIT>" +<EOL>self.name)<EOL><DEDENT>for region in regions:<EOL><INDENT>self.maskRegion(region)<EOL>if verbose:<EOL><INDENT>pind.done += <NUM_LIT:1><EOL>pind.showProgress()<EOL><DEDENT><DEDENT>
Mask the given regions in this sequence with Ns.

:param region: iterable of regions to mask. Each region can be any object
               with .start and .end attributes. Co-ords are zero based
               and inclusive of both end points. Any other attributes
               (e.g. chrom.) are ignored.
:param verbose: print status messages to stderr if True