library/src/main/java/de/mrapp/android/view/FloatingActionButton.java
public final void setSize(@NonNull final Size size) {
        Condition.INSTANCE.ensureNotNull(size, "The size may not be null");
        this.size = size;
        adaptShadow();
        adaptImageButtonSize();
        requestLayout();
    }
public final void setSize(@NonNull final Size size) {
        Condition.INSTANCE.ensureNotNull(size, "The size may not be null");
        this.size = size;
        adaptShadow();
        adaptImageButtonSize();
        requestLayout();
    }
Sets the floating action button's size.

@param size
The size, which should be set, as a value of the enum {@link Size}. The size must
either be <code>NORMAL</code> or <code>SMALL</code>