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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getInvestigators(self, tags = None, seperator = ";", _getTag = False):
 """Returns a list of the names of investigators. The optional arguments are ignored. # Returns `list [str]` > A list of all the found investigator's names """

        if tags is None:
            tags = ['Investigator']
        elif isinstance(tags, str):
            tags = ['Investigator', tags]
        else:
            tags.append('Investigator')
        return super().getInvestigators(tags = tags, seperator = seperator, _getTag = _getTag)