code: public List<DesignDocument> list() throws IOException {
          return db.getAllDocsRequestBuilder()
                  .startKey("_design/")
                  .endKey("_design0")
                  .inclusiveEnd(false)
                  .includeDocs(true)
                  .build()
                  .getResponse().getDocsAs(DesignDocument.class);
      }
docs: Performs a query to retrieve all the design documents defined in the database.
  
  @return a list of the design documents from the database
  @throws IOException if there was an error communicating with the server
  @since 2.5.0