Interfaces and types that are part of the public API, but not needed for basic use of the SDK.

Types in this namespace include:

• ILdClient, which allows the SDK client to be referenced via an interface rather than the concrete type LdClient (if for instance you want to create a mock implementation for testing).
• Types like IFlagTracker that provide a facade for some part of the SDK API; these are returned by properties like FlagTracker.
• Concrete types that are used as parameters within these interfaces, like FlagChangeEvent