private boolean hasValidInformation() {
		clearStatusText();
		String searchText = searchTextComboBox.getText().trim();
		if (searchText.isBlank()) {
			setStatusText("Please enter search text");
			return false;
		}
		if (selectedTypes.isEmpty()) {
			setStatusText("Please select at least one \"search for\" item to search!");
			return false;
		}
		return createQuery() != null;
	}
Returns the query generated by the dialog when the "Ok" button is pressed or null if the
dialog was cancelled.
@return the SearchAndReplaceQuery generated by the information in the dialog when the 
"Ok" button is pressed, or null if the dialog was cancelled.
Ghidra/Features/Base/src/main/java/ghidra/features/base/replace/SearchAndReplaceDialog.java