in src/connectors/sheets-connector.js [46:59]
constructor(config, apiHandler) {
super();
assert(config.tabs, 'tabs is missing in config.');
this.config = config
this.apiHandler = apiHandler;
this.activeSpreadsheet = SpreadsheetApp.getActive();
this.tabs = config.tabs;
// Caching for preventing querying the same data repeatedly.
this.propertyLookupCache = {};
this.healthCheck();
}