TurnType

Represents the lifecycle position of a unary request within a session.

Enums
TURN_TYPE_UNSPECIFIED	Unspecified turn type.
INITIALIZE	Explicitly indicates this request initializes the session in unary mode. When set, initial session variables (e.g., store metadata and menus) are injected into the session.
SUBSEQUENT	Explicitly indicates a subsequent conversational turn or mid-session update. When set, initial session variables are omitted to prevent input token explosion.