src/vs/workbench/contrib/search/common/searchModel.ts/Match/rangeInPreview
class Match:	rangeInPreview() {
		// convert to editor's base 1 positions.
		return {
			...this._fullPreviewRange,
			startColumn: this._fullPreviewRange.startColumn + 1,
			endColumn: this._fullPreviewRange.endColumn + 1
		};
	}