src/vs/editor/common/model/textModelTokens.ts/TokenizationStateStore/markMustBeTokenized
class TokenizationStateStore:	public markMustBeTokenized(lineIndex: number): void {
		this._lineNeedsTokenization.set(lineIndex, true);
		this._firstLineNeedsTokenization = Math.min(this._firstLineNeedsTokenization, lineIndex);
	}