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    16 using namespace lemon;  | 
    16 using namespace lemon;  | 
    17 using namespace lemon::concept;  | 
    17 using namespace lemon::concept;  | 
    18   | 
    18   | 
    19   | 
    19   | 
    20 int main() { | 
    20 int main() { | 
    21   ///\file  | 
         | 
    22   { // checking graph components | 
    21   { // checking graph components | 
    23     checkConcept<BaseGraphComponent, BaseGraphComponent >();  | 
    22     checkConcept<BaseGraphComponent, BaseGraphComponent >();  | 
    24   | 
    23   | 
    25     checkConcept<BaseIterableGraphComponent, BaseIterableGraphComponent >();  | 
    24     checkConcept<BaseIterableGraphComponent, BaseIterableGraphComponent >();  | 
    26   | 
    25   |