code: public String getBuildToolsLibDirectoryPath()
      {
          File buildToolsLib = new File( getBuildToolInfo().getLocation(), "lib" );
          if ( buildToolsLib.exists() ) 
          {
              return buildToolsLib.getAbsolutePath();
          }
          throw new InvalidSdkException( "Cannot find " + buildToolsLib );
      }
docs: Get the path for build-tools lib directory
  @return