src/vs/editor/contrib/gotoSymbol/browser/link/goToDefinitionAtPosition.ts/GotoDefinitionAtPositionEditorContribution/findDefinition
class GotoDefinitionAtPositionEditorContribution:	private findDefinition(position: Position, token: CancellationToken): Promise<LocationLink[] | null> {
		const model = this.editor.getModel();
		if (!model) {
			return Promise.resolve(null);
		}

		return getDefinitionsAtPosition(this.languageFeaturesService.definitionProvider, model, position, token);
	}