TrendlineCollection Class
TrendlineCollection class
Represents a collection of all the 
type TrendlineCollection struct  {
	ptr unsafe.Pointer
}
Constructors
| Method | Description | 
|---|
Methods
| Method | Description | 
|---|---|
| IsNull | Checks whether the implementation object is nullptr. | 
| Add_TrendlineType | Adds a Trendline object to this collection with specified type. | 
| Add_TrendlineType_String | Adds a Trendline object to this collection with specified type and name. | 
| Get | Gets a Trendline object by its index. | 
| GetCount |