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