code: private String getPrecompiledHeaderFile(final CommandLineCompilerConfiguration compilerConfig) {
      String pch = null;
      final String[] args = compilerConfig.getPreArguments();
      for (final String arg : args) {
        if (arg.startsWith("/Fp")) {
          pch = arg.substring(3);
        }
      }
      return pch;
    }
docs: Get value of PrecompiledHeaderFile property.
  
  @param compilerConfig
  compiler configuration.
  @return value of PrecompiledHeaderFile property.