Method constructor

src/importer/state.tsx:78–86

(
    importerDefinition: StateBuilderImporterDefinition,
    initialState?: ImporterState
  )

  protected buildSteps: ImporterAction[];

  constructor(
    importerDefinition: StateBuilderImporterDefinition,
    initialState?: ImporterState
  ) {
    this.importerDefinition = importerDefinition;
    this.initialState =
      initialState ?? buildInitialState(importerDefinition.sheets);
    this.buildSteps = [];
  }

  public async getState(): Promise<ImporterState> {
    let state = this.initialState;