public GenericDraweeHierarchyBuilder setFadeDuration(int fadeDuration) {
    mFadeDuration = fadeDuration;
    return this;
  }
Sets the duration of the fade animation.

<p>If not set, the default value of 300ms will be used.

@param fadeDuration duration in milliseconds
@return modified instance of this builder
drawee/src/main/java/com/facebook/drawee/generic/GenericDraweeHierarchyBuilder.java