code: public CoreDefinitionVersion withCores(Core... cores) {
          if (this.cores == null) {
              setCores(new java.util.ArrayList<Core>(cores.length));
          }
          for (Core ele : cores) {
              this.cores.add(ele);
          }
          return this;
      }
docs: A list of cores in the core definition version.
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setCores(java.util.Collection)} or {@link #withCores(java.util.Collection)} if you want to override the
  existing values.
  </p>
  
  @param cores
  A list of cores in the core definition version.
  @return Returns a reference to this object so that method calls can be chained together.