private void updateSelection(NavigatableActionContext context) {
		if (searchDialog != null) {
			searchDialog.setHasSelection(context.hasSelection());
		}
	}
The constructor for the SearchTextPlugin.

@param plugintool The tool required by this plugin.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/searchtext/SearchTextPlugin.java