public void setProtocols(final String protocols) {
            if (protocols == null) {
                this.protocols = null;
            } else {
                this.protocols = protocols.split("[ :,]");
            }
        }
Sets the TLS protocols accepted for secure connections. If not specified (null), then the default ones will
be used.

@param protocols Protocol list consisting of one or more protocols separated by colons, commas or spaces.

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