Declaring functions using a require statement inside a Node.js class

Question

I am willing to define class methods by using require statements. As follows:

class A {

  constructor () {}

  static functionA = require('./someFileA');
  static functionB = require('./someFileB');

  functionC = require('./someFileC');

}

Will there be any possible performance/memory leaks issues on doing this instead of doing all the requires at the beginning of the file (prior the Class definition) and then using them to define the methods?

(I'm using Node 12)

Thanks in advance,