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