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rOACCT/node_modules/stylis/src/Serializer.js
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Serializer.js
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			import {IMPORT, COMMENT, RULESET, DECLARATION, KEYFRAMES} from './Enum.js'
			import {strlen, sizeof} from './Utility.js'

			/**
			* @param {object[]} children
			* @param {function} callback
			* @return {string}
			*/
			export function serialize (children, callback) {
			var output = ''
			var length = sizeof(children)

			for (var i = 0; i < length; i++)
			output += callback(children[i], i, children, callback) \|\| ''

			return output
			}

			/**
			* @param {object} element
			* @param {number} index
			* @param {object[]} children
			* @param {function} callback
			* @return {string}
			*/
			export function stringify (element, index, children, callback) {
			switch (element.type) {
			case IMPORT: case DECLARATION: return element.return = element.return \|\| element.value
			case COMMENT: return ''
			case KEYFRAMES: return element.return = element.value + '{' + serialize(element.children, callback) + '}'
			case RULESET: element.value = element.props.join(',')
			}

			return strlen(children = serialize(element.children, callback)) ? element.return = element.value + '{' + children + '}' : ''
			}