How to use the @citation-js/core.plugins function in @citation-js/core

}

  var self = new core.Cite(data, opts)
  this._options = self._options
  this.log = self.log
  this.data = self.data
}

Cite.prototype = Object.create(core.Cite.prototype)

Cite.async = core.Cite.async
Cite.validateOptions = core.Cite.validateOptions
Cite.validateOutputOptions = core.Cite.validateOutputOptions

Cite.input = core.plugins.input.chain
Cite.inputAsync = core.plugins.input.chainAsync

Cite.util = Object.assign({ attr }, core.util)
Cite.version = {
  cite: core.version,
  citeproc: citeproc.PROCESSOR_VERSION
}

const CSL = core.plugins.config.get('@csl')

Cite.CSL = {
  engine: require('@citation-js/plugin-csl/lib/engines').fetchEngine,
  item (data) {
    return id => data.find(entry => entry.id === id)
  },
  locale (lang) {
    return CSL.styles.get(CSL.styles.has(lang) ? lang : 'en-US')

return new Cite(data, opts)
  }

  var self = new core.Cite(data, opts)
  this._options = self._options
  this.log = self.log
  this.data = self.data
}

Cite.prototype = Object.create(core.Cite.prototype)

Cite.async = core.Cite.async
Cite.validateOptions = core.Cite.validateOptions
Cite.validateOutputOptions = core.Cite.validateOutputOptions

Cite.input = core.plugins.input.chain
Cite.inputAsync = core.plugins.input.chainAsync

Cite.util = Object.assign({ attr }, core.util)
Cite.version = {
  cite: core.version,
  citeproc: citeproc.PROCESSOR_VERSION
}

const CSL = core.plugins.config.get('@csl')

Cite.CSL = {
  engine: require('@citation-js/plugin-csl/lib/engines').fetchEngine,
  item (data) {
    return id => data.find(entry => entry.id === id)
  },
  locale (lang) {

register: {
    addTemplate: CSL.templates.add.bind(CSL.templates),
    getTemplate: CSL.templates.get.bind(CSL.templates),
    hasTemplate: CSL.templates.has.bind(CSL.templates),
    addLocale: CSL.locales.add.bind(CSL.locales),
    getLocale: CSL.locales.get.bind(CSL.locales),
    hasLocale: CSL.locales.has.bind(CSL.locales)
  }
}

Cite.plugins = clone(core.plugins)
delete Cite.plugins.input.util.clean

Cite.parse = Object.assign({
  input: {
    chain: core.plugins.input.chain,
    chainAsync: core.plugins.input.chainAsync,
    chainLink: core.plugins.input.chainLink,
    chainLinkAsync: core.plugins.input.chainLinkAsync,
    data: core.plugins.input.data,
    dataAsync: core.plugins.input.dataAsync,
    type: core.plugins.input.type,
    async: {
      chain: core.plugins.input.chainAsync,
      chainLink: core.plugins.input.chainLinkAsync,
      data: core.plugins.input.dataAsync
    }
  },
  name: name.parse,
  date: date.parse,
  csl: core.plugins.input.util.clean,