presto-parser/src/main/java/io/prestosql/sql/tree/SetRole.java/SetRole/equals
class SetRole:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        SetRole setRole = (SetRole) o;
        return type == setRole.type &&
                Objects.equals(role, setRole.role);
    }