code: public String getSharedFileEndpoint(Object projectIdOrKey, Object sharedFileId) throws BacklogException {
          return buildEndpoint("projects/" + projectIdOrKey + "/files/" + sharedFileId);
      }
docs: Returns the endpoint of shared file.
  
  @param projectIdOrKey    the project identifier
  @param sharedFileId      the shared file identifier
  @return the endpoint
  @throws BacklogException