presto-main/src/main/java/io/prestosql/metadata/SignatureBinder.java/TypeRelationshipConstraintSolver/TypeRelationshipConstraintSolver
class TypeRelationshipConstraintSolver:        public TypeRelationshipConstraintSolver(TypeSignature formalTypeSignature, Set<String> typeVariables, Set<String> longVariables, Type actualType, RelationshipType relationshipType)
        {
            this.formalTypeSignature = formalTypeSignature;
            this.typeVariables = typeVariables;
            this.longVariables = longVariables;
            this.actualType = actualType;
            this.relationshipType = relationshipType;
        }