parameters: (self, source_class_id)
return_statement: return self.class_from_source_map[source_class_id]
docstring: Takes a source class ID and returns the int class ID assigned to it.
  
          For example: 
          dataset.map_source_class_id("coco.12") -> 23
docstring_summary: Takes a source class ID and returns the int class ID assigned to it.
docstring_tokens: Takes a source class ID and returns the int class ID assigned to it .
function: def map_source_class_id(self, source_class_id):
          """Takes a source class ID and returns the int class ID assigned to it.
  
          For example: 
          dataset.map_source_class_id("coco.12") -> 23
          """
          return self.class_from_source_map[source_class_id]
function_tokens: def map_source_class_id ( self , source_class_id ) : return self . class_from_source_map [ source_class_id ]