public GenericDraweeHierarchyBuilder setPlaceholderImage(@Nullable Drawable placeholderDrawable) {
    mPlaceholderImage = placeholderDrawable;
    return this;
  }
Sets the placeholder image.

@param placeholderDrawable drawable to be used as placeholder image
@return modified instance of this builder
drawee/src/main/java/com/facebook/drawee/generic/GenericDraweeHierarchyBuilder.java