src/CFDIReader/PostValidations/Validators.php
public function append(ValidatorInterface $validator)
    {
        if (false === $this->getIndex($validator)) {
            $this->validators[] = $validator;
        }
    }
public function append(ValidatorInterface $validator)
    {
        if (false === $this->getIndex($validator)) {
            $this->validators[] = $validator;
        }
    }
Append a validator into the list of validators,
this will search if the validator object does not exists
@param ValidatorInterface $validator