[SyntheticTextStore.from](https://github.com/keymanapp/keyman/blob/df0cd0c3f95cb4898e44538ec3a93a718bf3d882/web/src/engine/src/keyboard/syntheticTextStore.ts#L61) and [TextStore.restoreFrom](https://github.com/keymanapp/keyman/blob/df0cd0c3f95cb4898e44538ec3a93a718bf3d882/web/src/engine/src/keyboard/textStore.ts#L126)
