function compileTrust (rangeSubnets) {
  // Return optimized function based on length
  var len = rangeSubnets.length
  return len === 0
    ? trustNone
    : len === 1
      ? trustSingle(rangeSubnets[0])
      : trustMulti(rangeSubnets)
}
Compile range subnet array into trust function.

@param {Array} rangeSubnets
@private