makeOperations method
      
List<Operation<MappingContext> > 
makeOperations(
    
    
- SourceTree sourceTree,
- Mapper mapper,
- MappingDefinition definition
Implementation
List<Operation<MappingContext>>  makeOperations(SourceTree sourceTree, Mapper mapper, MappingDefinition definition) {
  List<Operation<MappingContext>> operations = [];
  // traverse recursively
  root.makeOperations(sourceTree, this, mapper, definition, operations);
  return operations;
}