diff --git a/bar_filler.go b/bar_filler.go
index c8cedaa..3d582a4 100644
--- a/bar_filler.go
+++ b/bar_filler.go
@@ -14,13 +14,16 @@
 //
 // Default implementations can be obtained via:
 //
-//	func NewBarFiller(style string) BarFiller
-//	func NewBarFillerRev(style string) BarFiller
-//	func NewBarFillerPick(style string, rev bool) BarFiller
-//	func NewSpinnerFiller(style []string, alignment SpinnerAlignment) BarFiller
+//	func NewBarFiller(BarStyle()) BarFiller
+//	func NewBarFiller(SpinnerStyle()) BarFiller
 //
 type BarFiller interface {
 	Fill(w io.Writer, reqWidth int, stat decor.Statistics)
+}
+
+// BarFillerBuilder interface.
+type BarFillerBuilder interface {
+	Build() BarFiller
 }
 
 // BarFillerFunc is function type adapter to convert function into BarFiller.
@@ -29,3 +32,8 @@
 func (f BarFillerFunc) Fill(w io.Writer, reqWidth int, stat decor.Statistics) {
 	f(w, reqWidth, stat)
 }
+
+// NewBarFiller constructs a BarFiller from provided BarFillerBuilder.
+func NewBarFiller(b BarFillerBuilder) BarFiller {
+	return b.Build()
+}