__init__ (
        self,
        data,
        name=None,
        nolink=0,
        )

addLabelToElement (
        self,
        label,
        coord,
        )

addLabelToElements (
        self,
        label,
        coords,
        )

addLabelsToElement (
        self,
        labels,
        coord,
        )

addLabelsToElements (
        self,
        labels,
        coords,
        )

getElementsByLabel ( self,  label )

getKeysByLabel ( self,  label )

getLabelByElement (
        self,
        coord,
        n=0,
        )

getLabelByElements (
        self,
        coords=None,
        n=0,
        )

getLabelsByElement ( self,  coord )

getLabelsByElements ( self,  coords )

removeLabel ( self,  label )

removeLabelFromElement (
        self,
        label,
        coord,
        )

removeLabelFromKey (
        self,
        label,
        key,
        )

removeLabelsFromElement ( self,  coord )

removeLabelsFromKey ( self,  key )