boolHide()const;// if true then element was hidden, works only inside BeginModification and EndModification, on EndModification all Hidden elements are deleted
boolHide()const;// if true then element was hidden, works only inside BeginModification and EndModification, on EndModification all Hidden elements are deleted
boolShow()const;// if true then element was recovered
boolShow()const;// if true then element was recovered
/// \warning This function will not resolve an ierarchical strucutre of ElementSet, use ElemnetSet::DeleteSet instead
/// Remove element from mesh.
/// If you call this function inside modification phase, see Mesh::BeginModification and Mesh::EndModification,
/// and the element was not created during modification phase (not marked as Element::New),
/// then the element will not be actually destroyed but hidden.
/// You can restore all the hidden elements by using Mesh::ToggleModification.
/// \warning This function will not resolve an ierarchical strucutre of ElementSet, use ElemnetSet::DeleteSet instead.
/// @return Returns true if the element was actually destroyed. Returns false if the element was hidden.
boolDelete();// if true then element was deleted, otherwise it was hidden
boolDelete();// if true then element was deleted, otherwise it was hidden