In Maria Chin Abdullah v Ketua Pengarah Imigresen & Anor [2021] 2 CLJ 579 at 650, Abdul Rahman Sebli FCJ opined that "[W]hat the proposition amounts to is to elevate the status of the doctrine of separation of powers above that of the Federal Constitution. This is a dangerous proposition as it practically transforms the doctrine of separation of powers into the supreme law of the land in place of the Federal Constitution, effectively putting an end to constitutional supremacy that this country subscribes to as enshrined in art. 4(1) of the Federal Constitution which declares that "This Constitution shall be the supreme law of the Federation".

Critically examine the above statement.

Discuss the position of the doctrine of separation of powers in Malaysia widely and support your answer with legal provisions, examples and decided cases (if any).