src/vs/editor/common/languages/supports/indentRules.ts/IndentRulesSupport/getIndentMetadata
class IndentRulesSupport:	public getIndentMetadata(text: string): number {
		let ret = 0;
		if (this.shouldIncrease(text)) {
			ret += IndentConsts.INCREASE_MASK;
		}
		if (this.shouldDecrease(text)) {
			ret += IndentConsts.DECREASE_MASK;
		}
		if (this.shouldIndentNextLine(text)) {
			ret += IndentConsts.INDENT_NEXTLINE_MASK;
		}
		if (this.shouldIgnore(text)) {
			ret += IndentConsts.UNINDENT_MASK;
		}
		return ret;
	}