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rOACCT/node_modules/jss/src/SheetsRegistry.js
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SheetsRegistry.js
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			import getWhitespaceSymbols from './utils/getWhitespaceSymbols'
			/**
			* Sheets registry to access all instances in one place.
			*/
			export default class SheetsRegistry {
			registry = []

			/**
			* Current highest index number.
			*/
			get index() {
			return this.registry.length === 0 ? 0 : this.registry[this.registry.length - 1].options.index
			}

			/**
			* Register a Style Sheet.
			*/
			add(sheet) {
			const {registry} = this
			const {index} = sheet.options

			if (registry.indexOf(sheet) !== -1) return

			if (registry.length === 0 \|\| index >= this.index) {
			registry.push(sheet)
			return
			}

			// Find a position.
			for (let i = 0; i < registry.length; i++) {
			if (registry[i].options.index > index) {
			registry.splice(i, 0, sheet)
			return
			}
			}
			}

			/**
			* Reset the registry.
			*/
			reset() {
			this.registry = []
			}

			/**
			* Remove a Style Sheet.
			*/
			remove(sheet) {
			const index = this.registry.indexOf(sheet)
			this.registry.splice(index, 1)
			}

			/**
			* Convert all attached sheets to a CSS string.
			*/
			toString({attached, ...options} = {}) {
			const {linebreak} = getWhitespaceSymbols(options)
			let css = ''
			for (let i = 0; i < this.registry.length; i++) {
			const sheet = this.registry[i]
			if (attached != null && sheet.attached !== attached) {
			continue
			}
			if (css) css += linebreak
			css += sheet.toString(options)
			}
			return css
			}
			}