apollo-client-config-data/src/main/java/com/ctrip/framework/apollo/config/data/system/ApolloClientSystemPropertyInitializer.java/ApolloClientSystemPropertyInitializer/ApolloClientSystemPropertyInitializer
class ApolloClientSystemPropertyInitializer:  public ApolloClientSystemPropertyInitializer(Log log) {
    this.log = log;
  }