private void setLengthInputEnabled(boolean enabled) {
		if (!enabled) {
			numberInputField.setValue(null);
		}
		numberInputField.setEnabled(enabled);

	}
Class to set up dialog box that will enable the user
to set the available options for block selection
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/select/SelectBlockDialog.java