#TODO: docstring

    :param fgiContainer:
    :param linkageGroups:

    :returns: a list of ids of the newly generated :class:`Fgi`

def generateFeatureGroups(fgiContainer, linkageGroups, matchArr, timeKey,
                          massKey, logMassKey, massScalingFactor):
    """ #TODO: docstring

    :param fgiContainer:
    :param linkageGroups:

    :returns: a list of ids of the newly generated :class:`Fgi`
    """
    #Generate feature groups from the linked features
    newFgiIds = list()
    for linkageGroup in viewvalues(linkageGroups):
        fgiId = fgiContainer._getNextFgiId()
        fgi = fiGroupFromLinkageGroup(matchArr, linkageGroup, fgiId,
                                      timeKey, massKey
                                      )
        fgiContainer.container[fgiId] = fgi
        fgi.metrics = clusterMetrics(matchArr[timeKey][linkageGroup],
                                     matchArr[logMassKey][linkageGroup],
                                     massScalingFactor=massScalingFactor
                                     )
        fgi.rt = fgi.metrics['meanTime']
        fgi.mz = fgi.metrics['meanMass']
        newFgiIds.append(fgiId)
    return newFgiIds