def getDefaultId(self, id):
    " Return the default (first in list) id given any of the particle's ids.\n        "
    for items in self._list:
        if (id in items[0]):
            return items[0][0]
    return id
Return the default (first in list) id given any of the particle's ids.
def getDefaultId(self, id):
    " \n        "
    for items in self._list:
        if (id in items[0]):
            return items[0][0]
    return id