@mixin transition-duration ($duration) {
  @include transition($duration);
}

@mixin transition-very-very-fast ($properties: null, $delay: null) {
  @include transition($transition-very-very-fast, $properties, $delay);
}

@mixin transition-very-fast ($properties: null, $delay: null) {
  @include transition($transition-very-fast, $properties, $delay);
}

@mixin transition-fast ($properties: null, $delay: null) {
  @include transition($transition-fast, $properties, $delay);
}

@mixin transition-medium ($properties: null, $delay: null) {
  @include transition($transition-medium, $properties, $delay);
}

@mixin transition-slow ($properties: null, $delay: null) {
  @include transition($transition-slow, $properties, $delay);
}

@mixin transition-very-slow ($properties: null, $delay: null) {
  @include transition($transition-very-slow, $properties, $delay);
}

@mixin transition-very-very-slow ($properties: null, $delay: null) {
  @include transition($transition-very-very-slow, $properties, $delay);
}