question: adds a feature to the entity capabilities . concode_field_sep Set<String> features concode_elem_sep String verAttribute concode_elem_sep String hashAttribute concode_elem_sep Set<String> identities concode_field_sep void setHashAttribute concode_elem_sep void writeExternal concode_elem_sep String getVerAttribute concode_elem_sep boolean containsFeature concode_elem_sep void readExternal concode_elem_sep boolean addIdentity concode_elem_sep int getCachedSize concode_elem_sep void setVerAttribute concode_elem_sep boolean containsIdentity concode_elem_sep String getHashAttribute
target: boolean function ( String arg0 ) { return features . add ( arg0 ) ; }