md`# Library : ListElement cell
The \`ListElement\` cell accepts value and label arrays, presents them in a table.
It is instantiated given a single options object to specify parameters.
Given a \`selectAction\`, changes are provided immediately.
Give a \`saveAction\`, an 'update' button is aded to the presentation.
Where selections are managed, an additional check box checks/unchecks all entries.
A click in the header collapses and expands the presentation.
The presentation is provided as the value of the \`html\` attribute.
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