src/Tokenizer/Tokens.php
public static function detectBlockType(Token $token)
    {
        foreach (self::getBlockEdgeDefinitions() as $type => $definition) {
            if ($token->equals($definition['start'])) {
                return ['type' => $type, 'isStart' => true];
            }

            if ($token->equals($definition['end'])) {
                return ['type' => $type, 'isStart' => false];
            }
        }
    }
public static function detectBlockType(Token $token)
    {
        foreach (self::getBlockEdgeDefinitions() as $type => $definition) {
            if ($token->equals($definition['start'])) {
                return ['type' => $type, 'isStart' => true];
            }

            if ($token->equals($definition['end'])) {
                return ['type' => $type, 'isStart' => false];
            }
        }
    }
Detect type of block.

@param Token $token token

@return null|array array with 'type' and 'isStart' keys or null if not found