TCA::getColumns() 

\nn\t3::TCA()->getColumns($tableName = '', $useSchemaManager = false); 

Gets configuration array for a table from the TCA. Alias to \nn\t3::Db()->getColumns()

\nn\t3::TCA()->getColumns( 'pages' );
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| @return array

Source Code 

public function getColumns( $tableName = '', $useSchemaManager = false)
{
	return \nn\t3::Db()->getColumns( $tableName, $useSchemaManager );
}
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