docs: private Tech getTech(String techName) throws ApiException {
  		String trimmedTechName = techName.trim();
  		for(Tech tech : Tech.builtInTech) {
  			if (tech.toString().equalsIgnoreCase(trimmedTechName))
  				return tech;
  		}
  		throw new ApiException(Type.ILLEGAL_PARAMETER, 
  				"The tech '" + trimmedTechName + "' does not exist");
  	}