If set, the system will wait to receive the function response before continuing the conversation.
If set, the system will not wait to receive the function response. Instead, it will attempt to handle function responses as they become available while maintaining the conversation between the user and the model.
This value is unspecified.
Specifies the function Behavior. Currently only non-blocking functions are supported. If not specified, the system keeps the current function call behavior. This field is currently only supported by the BidiGenerateContent method.