code: public function setLegalDocument1( $legalDocument1 )
      {
          $legalDocument1 = preg_replace( '/\D/', '', $legalDocument1 );
  
          if (empty( $legalDocument1 )) {
              throw new InvalidArgumentException( 'LegalDocument1 is empty!' );
          }
  
          $this->legalDocument1 = $legalDocument1;
  
          return $this;
      }
docs: @param  string $legalDocument1
  
  @return $this
  @throws \InvalidArgumentException