code: public EnvironmentPropertyDescriptions withPropertyGroupDescriptions(PropertyGroup... propertyGroupDescriptions) {
          if (this.propertyGroupDescriptions == null) {
              setPropertyGroupDescriptions(new java.util.ArrayList<PropertyGroup>(propertyGroupDescriptions.length));
          }
          for (PropertyGroup ele : propertyGroupDescriptions) {
              this.propertyGroupDescriptions.add(ele);
          }
          return this;
      }
docs: <p>
  Describes the execution property groups.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setPropertyGroupDescriptions(java.util.Collection)} or
  {@link #withPropertyGroupDescriptions(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param propertyGroupDescriptions
  Describes the execution property groups.
  @return Returns a reference to this object so that method calls can be chained together.