Blend follows a 3 step process - flatten, transform and deflatten to perform object mapping.
Removes the hierarchy/nested JSON structure by converting all nodes to leaf nodes. Nested fields are aggregated using a dot (.) separated notation.
Iterated over the patches provided in YAML file and applies them one by one. The keys present in fromField are mapped to toField
Build back the nested JSON structure, inverse of Step 1 - resulting the target structure.
