rml:REGISTRY_REMAP

Default at /registry/remap

Remap the registry.

Type          |  Name    | Description

String        | registry | the register name for the registry.
JsonObject    | mapping  | the mapping
     \
      --String| *        | the name is old name, the value is the new name.

For example:

{
  "registry": "minecraft:items",
  "mapping": {
    "minecraft:totem": "minecraft:totem_of_undying"
  }
}