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