code: def to_json(self, schema_info=True):
          
          genomes = set()
          result = {}
          result["edges"] = []
          for bgedge in self.edges():
              genomes |= bgedge.multicolor.colors
              result["edges"].append(bgedge.to_json(schema_info=schema_info))
          result["vertices"] = [bgvertex.to_json(schema_info=schema_info) for bgvertex in self.nodes()]
          result["genomes"] = [bggenome.to_json(schema_info=schema_info) for bggenome in genomes]
          return result
docs: JSON serialization method that account for all information-wise important part of breakpoint graph