presto-main/src/main/java/io/prestosql/operator/annotations/CastImplementationDependency.java/CastImplementationDependency/equals
class CastImplementationDependency:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        CastImplementationDependency that = (CastImplementationDependency) o;
        return Objects.equals(fromType, that.fromType) &&
                Objects.equals(toType, that.toType);
    }