AddInvoiceSignature::down PHP Method

    public function down()
    {
        Schema::table('invitations', function ($table) {
            $table->dropColumn('signature_base64');
            $table->dropColumn('signature_date');
        });
        Schema::table('companies', function ($table) {
            $table->dropColumn('utm_source');
            $table->dropColumn('utm_medium');
            $table->dropColumn('utm_campaign');
            $table->dropColumn('utm_term');
            $table->dropColumn('utm_content');
        });
    }