function _getCurrencyData (callback) {
    const span = tracer.startSpan("_getCurrencyData")
    const data = require('./data/currency_conversion.json');
    span.end()
    callback(data);
  }
/**
   * Helper function that gets currency data from a stored JSON file
   * Uses public data from European Central Bank
   */
Helper function that gets currency data from a stored JSON file
Uses public data from European Central Bank
Helper function that gets currency data from a stored JSON file Uses public data from European Central Bank
function _getCurrencyData (callback) {
    const span = tracer.startSpan("_getCurrencyData")
    const data = require('./data/currency_conversion.json');
    span.end()
    callback(data);
  }
function _getCurrencyData ( callback ) { const span = tracer . startSpan ( "_getCurrencyData" ) const data = require ( './data/currency_conversion.json' ) ; span . end ( ) callback ( data ) ; }
Helper function that gets currency data from a stored JSON file
 Uses public data from European Central Bank
Helper function that gets currency data from a stored JSON file Uses public data from European Central Bank