extensions/typescript-language-features/src/languageFeatures/diagnostics.ts/DiagnosticsManager/rebuildAll
class DiagnosticsManager:	private rebuildAll(): void {
		this._currentDiagnostics.clear();
		for (const fileDiagnostic of this._diagnostics.values) {
			this.rebuildFile(fileDiagnostic);
		}
	}