question: gets the number of entities involved in this relationship type . concode_field_sep String NOT_A_RELATIONSHIP concode_elem_sep RelationshipConstraint relConstraints concode_elem_sep RoleConstraint[] roleConstraints concode_elem_sep EntityMatcher[] entityMatchers concode_elem_sep Hashtable<String,Integer> indexes concode_elem_sep int numberEntities concode_elem_sep long serialVersionUID concode_elem_sep String type concode_field_sep void setConstraints concode_elem_sep void setConstraints concode_elem_sep int getIndex concode_elem_sep RoleConstraint getConstraint concode_elem_sep String getType concode_elem_sep void setMatchers concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep EntityMatcher getMatchers concode_elem_sep void setType concode_elem_sep RelationshipConstraint getRelationshipConstraint concode_elem_sep boolean isType concode_elem_sep Set<String> getRoles
target: int function ( ) { return numberEntities ; }