private String getBooleanEntryAsString(final OptionSpec spec) {
    // return the string representation of the boolean value corresponding to the option in toml
    // file
    // or null if not present in the config
    return getKeyName(spec).map(result::getBoolean).map(Object::toString).orElse(null);
  }
Creates a new TomlConfigurationDefaultProvider from an input stream.

@param commandLine the command line
@param inputStream the input stream
@return a new TomlConfigurationDefaultProvider
app/src/main/java/org/hyperledger/besu/cli/util/TomlConfigurationDefaultProvider.java