/// Throws Sass warnings to announce library deprecations. You can disable them
/// by setting the `$output-bourbon-deprecation-warnings` variable to `false`.
///
/// @access private
@mixin _bourbon-deprecate($feature, $message: null) {
  @if $output-bourbon-deprecation-warnings == true {
    @warn "[Bourbon] [Deprecation] `#{$feature}` is deprecated and will be " +
      "removed in 5.0.0. #{$message}";
    @content;
  }
}

@mixin _bourbon-deprecate-for-prefixing($feature) {
  @include _bourbon-deprecate($feature, "We suggest using an automated " +
    "prefixing tool, like Autoprefixer.");
}