text: #ifndef VertexReco_VertexFwd_h
  #define VertexReco_VertexFwd_h
  #include <vector>
  #include "DataFormats/Common/interface/Ref.h"
  #include "DataFormats/Common/interface/RefProd.h"
  #include "DataFormats/Common/interface/RefVector.h"
  
  namespace reco {
    class Vertex;
    /// collection of Vertex objects
    typedef std::vector<Vertex> VertexCollection;
    /// persistent reference to a Vertex
    typedef edm::Ref<VertexCollection> VertexRef;
    /// persistent reference to a Vertex
    typedef edm::RefProd<VertexCollection> VertexRefProd;
    /// vector of references to Vertex objects in the same collection
    typedef edm::RefVector<VertexCollection> VertexRefVector;
    /// iterator over a vector of references to Vertex objects in the same collection
    typedef VertexRefVector::iterator vertex_iterator;
    /// persistent reference to a Vertex, using views
    typedef edm::RefToBase<reco::Vertex> VertexBaseRef;
  }
  
  #endif
  