code: def exists(self, relpath, rsc=None, useFilepath=None):
          
          path = self.find(relpath, rsc, useFilepath)
          if path.startswith(':'):
              return QtCore.QResource(path).isValid()
          else:
              return os.path.exists(path)
docs: Checks to see if the inputed path represents an existing file or directory.
  
          :param      relpath     | <str>
                      rsc         | <str>
                      useFilepath | <bool> or None