attributeTypeCombo = ( Combo ) attributeTypeComboField.getControl();
attributeTypeCombo.setItems( possibleAttributeTypes );
attributeTypeCombo.setText( parsedAttributeType );
// content proposal adapter
attributeTypeCPA = new ContentProposalAdapter (attributeTypeCombo, new ComboContentAdapter(),
new ListContentProposalProvider( attributeTypeCombo.getItems() ), null, null );
attributeTypeCPA.setFilterStyle( ContentProposalAdapter.FILTER_NONE );
attributeTypeCPA.setProposalAcceptanceStyle( ContentProposalAdapter.PROPOSAL_REPLACE );
BaseWidgetUtils.createSpacer( composite, 1 );