public Duration getImmediateConnectTimeout() {
        return this.immediateConnectTimeout == null ? DEFAULT_IMMEDIATE_CONNECT : this.immediateConnectTimeout;
    }
Get the connection timeout at application startup.

@return connection timeout at application startup.

@see #setImmediateConnectTimeout(Duration)
grpc-client-spring-boot-starter/src/main/java/net/devh/boot/grpc/client/config/GrpcChannelProperties.java