code: public void setFunctions(java.util.Collection<Function> functions) {
          if (functions == null) {
              this.functions = null;
              return;
          }
  
          this.functions = new java.util.ArrayList<Function>(functions);
      }
docs: A list of Lambda functions in this function definition version.
  
  @param functions
  A list of Lambda functions in this function definition version.