BEFORE BASE 3
block1 base 1
block2 base 2
block3 base 3
    BEFORE ALL
    BEFORE BASE 3
block1 base 1
block2 base 2
block3 base 3
    block4 embed
    parent=block4 base 3
    block1=block1 base 1
    block2=block2 base 2
    block3=block3 base 3
    AFTER BASE 3
    AFTER ALL
AFTER BASE 3