src/vs/editor/common/model/bracketPairsTextModelPart/bracketPairsTree/ast.ts/ListAstNode/computeMinIndentation
class ListAstNode:	public computeMinIndentation(offset: Length, textModel: ITextModel): number {
		if (this.cachedMinIndentation !== -1) {
			return this.cachedMinIndentation;
		}

		let minIndentation = Number.MAX_SAFE_INTEGER;
		let childOffset = offset;
		for (let i = 0; i < this.childrenLength; i++) {
			const child = this.getChild(i);
			if (child) {
				minIndentation = Math.min(minIndentation, child.computeMinIndentation(childOffset, textModel));
				childOffset = lengthAdd(childOffset, child.length);
			}
		}

		this.cachedMinIndentation = minIndentation;
		return minIndentation;
	}