Updated the contours ElementOperation
Updated the contours ElementOperation

ioam/holoviews,mjabri/holoviews,mjabri/holoviews,ioam/holoviews,vascotenner/holoviews,vascotenner/holoviews,ioam/holoviews,vascotenner/holoviews,basnijholt/holoviews,basnijholt/holoviews,basnijholt/holoviews,mjabri/holoviews