public BuildParameterBuilder addConfig(String pathToConfig) {
        if (pathToConfig != null && !pathToConfig.isEmpty()) {
            configs.add(pathToConfig);
        }

        return this;
    }
Adds a configuration file to the builder.

@param pathToConfig Path to the configuration file.
@return Returns the builder.
smithy-cli/src/main/java/software/amazon/smithy/cli/BuildParameterBuilder.java