src/vs/editor/common/tokens/lineTokens.ts/SliceLineTokens/equals
class SliceLineTokens:	public equals(other: IViewLineTokens): boolean {
		if (other instanceof SliceLineTokens) {
			return (
				this._startOffset === other._startOffset
				&& this._endOffset === other._endOffset
				&& this._deltaOffset === other._deltaOffset
				&& this._source.slicedEquals(other._source, this._firstTokenIndex, this._tokensCount)
			);
		}
		return false;
	}