lib/from.js
function from(arg, encodingOrOffset, length) {
  if (typeof arg === 'number') {
    throw new TypeError('Argument must not be a number')
  }
  return Buffer(arg, encodingOrOffset, length)
}
function from(arg, encodingOrOffset, length) {
  if (typeof arg === 'number') {
    throw new TypeError('Argument must not be a number')
  }
  return Buffer(arg, encodingOrOffset, length)
}
function from ( arg , encodingOrOffset , length ) { if ( typeof arg === 'number' ) { throw new TypeError ( 'Argument must not be a number' ) } return Buffer ( arg , encodingOrOffset , length ) }
ported from `safe-buffer`
ported from safe - buffer