parameters: (tool, name, setting_type)
docstring: Defines a setting that is only found in MSBuild.
  
    Args:
      tool: a dictionary that gives the names of the tool for MSVS and MSBuild.
      name: the name of the setting.
      setting_type: the type of this setting.
docstring_summary: Defines a setting that is only found in MSBuild.
docstring_tokens: Defines a setting that is only found in MSBuild .
function: def _MSBuildOnly(tool, name, setting_type):
    """Defines a setting that is only found in MSBuild.
  
    Args:
      tool: a dictionary that gives the names of the tool for MSVS and MSBuild.
      name: the name of the setting.
      setting_type: the type of this setting.
    """
    _msbuild_validators[tool.msbuild_name][name] = setting_type.ValidateMSBuild
function_tokens: def _MSBuildOnly ( tool , name , setting_type ) : _msbuild_validators [ tool . msbuild_name ] [ name ] = setting_type . ValidateMSBuild