m_ClustererEditor.setCapabilitiesFilter(filterClass);
// check capabilities
m_StartBut.setEnabled(true);
Capabilities currentFilter = m_ClustererEditor.getCapabilitiesFilter();
Clusterer clusterer = (Clusterer) m_ClustererEditor.getValue();
Capabilities currentSchemeCapabilities = null;
if (clusterer != null && currentFilter != null &&
(clusterer instanceof CapabilitiesHandler)) {
currentSchemeCapabilities = ((CapabilitiesHandler)clusterer).getCapabilities();