Function updateMounted

src/useController.ts:219–225

(name: InternalFieldName, value: boolean)

    });

    const updateMounted = (name: InternalFieldName, value: boolean) => {
      const field: Field = get(control._fields, name);

      if (field && field._f) {
        field._f.mount = value;
      }
    };

    updateMounted(name, true);