public boolean isVisible(ComponentProvider provider) {
		ComponentPlaceholder placeholder = getActivePlaceholder(provider);
		if (placeholder != null) {
			return placeholder.isActive();
		}
		return false;
	}
Returns true if the specified provider's component is or soon will be visible.

@param provider component provider
@return true if the specified provider's component is visible
Ghidra/Framework/Docking/src/main/java/docking/DockingWindowManager.java