src/vs/workbench/api/common/extHostWebviewPanels.ts/ExtHostWebviewPanel/_updateViewState
class ExtHostWebviewPanel:	_updateViewState(newState: { active: boolean; visible: boolean; viewColumn: vscode.ViewColumn }) {
		if (this.#isDisposed) {
			return;
		}

		if (this.active !== newState.active || this.visible !== newState.visible || this.viewColumn !== newState.viewColumn) {
			this.#active = newState.active;
			this.#visible = newState.visible;
			this.#viewColumn = newState.viewColumn;
			this.#onDidChangeViewState.fire({ webviewPanel: this });
		}
	}