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import { _indexOf } from '../equals.js'import { type as typeMethod } from '../type.js'
export class _Set{  constructor(){    this.set = new Set()    this.items = {}  }
  checkUniqueness(item){    const type = typeMethod(item)    if ([ 'Null', 'Undefined', 'NaN' ].includes(type)){      if (type in this.items){        return false      }      this.items[ type ] = true
      return true    }    if (![ 'Object', 'Array' ].includes(type)){      const prevSize = this.set.size      this.set.add(item)
      return this.set.size !== prevSize    }
    if (!(type in this.items)){      this.items[ type ] = [ item ]
      return true    }
    if (_indexOf(item, this.items[ type ]) === -1){      this.items[ type ].push(item)
      return true    }
    return false  }}