code: public boolean removeOffering(String offeringName) {
          if(offeringName == null)
              throw new NullPointerException("The parameter \"cloudOfferingId\" cannot be null.");
  
          BasicDBObject query = new BasicDBObject("offering_name", offeringName);
          Document removedOffering = this.offeringsCollection.findOneAndDelete(query);
  
          return removedOffering != null;
      }
docs: Remove an offering
  
  @param offeringName the name of the offering to remove
  @return