code: public TemporaryFileBuilder fromClasspathResource(final String pathToResource) {
          final Class<?> callerClass = getCallerClass();
          this.content = getResolver().resolve(pathToResource, callerClass);
          return this;
      }
docs: Defines the classpath resource from where the content of the file should be retrieved
  
  @param pathToResource
  the path to the classpath resource
  @return the builder