Apply an icon set's pre-mappings to the node.icon channel: merges value -> icon overrides onto any existing icon mapping (set wins on collision; existing driver wins unless the channel was empty). Returns a NEW spec; the input is untouched.
Apply an icon set's pre-mappings to the node.icon channel: merges value -> icon overrides onto any existing icon mapping (set wins on collision; existing driver wins unless the channel was empty). Returns a NEW spec; the input is untouched.