Iterable < String > function ( ) { return st ; }
return the set of vertices as an iterable . concode_field_sep ST<String,SET<String>> st concode_elem_sep int E concode_field_sep boolean hasEdge concode_elem_sep int E concode_elem_sep int V concode_elem_sep Iterable<String> adjacentTo concode_elem_sep int degree concode_elem_sep void main concode_elem_sep String toString concode_elem_sep void validateVertex concode_elem_sep void addEdge concode_elem_sep void addVertex concode_elem_sep boolean hasVertex