code: public function setLegalDocument2( $legalDocument2 )
      {
          $legalDocument2 = preg_replace( '/\D/', '', $legalDocument2 );
  
          if (empty( $legalDocument2 )) {
              throw new InvalidArgumentException( 'LegalDocument2 is empty!' );
          }
  
          $this->legalDocument2 = $legalDocument2;
  
          return $this;
      }
docs: @param  string $legalDocument2
  
  @return $this
  @throws \InvalidArgumentException