src/vs/workbench/contrib/terminal/browser/terminalInstance.ts/TerminalInstance/_getBuiltInXtermRenderer
class TerminalInstance:	private _getBuiltInXtermRenderer(gpuAcceleration: string, suggestedRendererType?: string): RendererType {
		let rendererType: RendererType = 'canvas';
		if (gpuAcceleration === 'off' || (gpuAcceleration === 'auto' && suggestedRendererType === 'dom')) {
			rendererType = 'dom';
		}
		return rendererType;
	}