[TYPO3-dev] get TCA['columns'] from extend plugin

[Tudor]

Hi,
I'm writing a extended plugin form sr_feuser_register_2.5.24.

Makers from the feuser are added here: addTcaMarkers   in this line:
foreach ($this->TCA['columns'] as $colName => $colSettings) {

I want to add the TCA['columns'] from my extended plugin in this foreach.
How can i get the TCA['columns'] from my extended plugin?

Best regards,
Pali Tudor