void revert() {
            for (UndoLogEntry op : this.ops) {
                op.revert();
            }
        }
Keeps track of mapped object during this mapping process execution.
Objects, which are referenced multiple types in object hierarchy will be fetched from here
to retain referential integrity of resulting object graph.
core/src/main/java/com/github/dozermapper/core/MappedFieldsTracker.java