/// Checks for a valid CSS size.
///
/// @param {String} $value
///
/// @require {function} contains
/// @require {function} is-length

@function is-size($value) {
  @if $output-bourbon-deprecation-warnings == true {
    @warn "[Bourbon] [Deprecation] `is-size` is deprecated and will be " +
    "removed in 5.0.0.";
  }

  $user-deprecation-warnings-setting: $output-bourbon-deprecation-warnings;
  $output-bourbon-deprecation-warnings: false !global;

  @return is-length($value)
          or contains("fill" "fit-content" "min-content" "max-content", $value);

  $output-bourbon-deprecation-warnings: $user-deprecation-warnings-setting !global;
}