public void setCiphers(final String ciphers) {
            if (ciphers == null) {
                this.ciphers = null;
            } else {
                this.ciphers = Arrays.asList(ciphers.split("[ :,]"));
            }
        }
Sets the cipher suite accepted for secure connections (in the order of preference). If not specified (null),
then the default suites should be used.

@param ciphers Cipher suite consisting of one or more cipher strings separated by colons, commas or spaces

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