/*! @page visualisation LEmuSR Tree
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@section svisualisation The visualisation manager It is possible to have visualization of the simulation. Many devices are available and they have to be set up using the LEMuSRVisManager class, that inherits form the G4VisManager class. For example, using the OpenGL system, one can benefit of a real time visualitation of the simulation. Using to DAWNFILE system, one can get snapshots of the simulation into postscript files. Various visualization systems can be loaded simultaneousely. */