[java] Compilation error when creating classes for operation ref $ref: #/path/~1..

Description

I am getting a compilation error on the code generated using maven plugin "swagger-codegen-maven-plugin" v 3.0.32 when I have operational ref pointing to something in the path.

Swagger-codegen version

3.0.32

Swagger declaration file content or url

https://gist.github.com/mokapat/9b731085bdb01fd1acdc5824594bc523

Command line used for generation

<plugin> <groupId>io.swagger.codegen.v3</groupId> <artifactId>swagger-codegen-maven-plugin</artifactId> <version>3.0.32</version> <dependencies> <dependency> <groupId>com.github.jknack</groupId> <artifactId>handlebars</artifactId> <version>4.3.0</version> </dependency> </dependencies> <executions> <execution> <goals> <goal>generate</goal> </goals> <configuration> <inputSpec>${basedir}/path/to/json</inputSpec> <language>java</language> <library>resttemplate</library> <modelPackage>com.demo.client.model</modelPackage> <apiPackage>com.demo.client.api</apiPackage> <invokerPackage>com.demo.client.invoker</invokerPackage> <generateApiTests>false</generateApiTests> <generateApiDocumentation>false</generateApiDocumentation> <generateModelTests>false</generateModelTests> <generateModelDocumentation>false</generateModelDocumentation> <generateSupportingFiles>true</generateSupportingFiles> <output>.</output> <configOptions> <interfaceOnly>true</interfaceOnly> <dateLibrary>17</dateLibrary> <source>17</source> <target>17</target> </configOptions> </configuration> </execution> </executions> </plugin>

Steps to reproduce

Related issues/PRs

Suggest a fix/enhancement

Start with the Swagger declaration in the linked gist and the provided swagger-codegen-maven-plugin configuration, then reproduce generation with version 3.0.32. Inspect the generated Java output for an operation $ref targeting a path and capture the compilation error; done means the generated client compiles for this input.