append
Appends a subshape to a compound shape. A shape has one owner, so the subshape is detached from its previous block or compound shape. Line shapes cannot be subshapes. The call fails when the shape tree would nest more than 128 shapes. Required scope: "shape/change" Experimental: this API may change in a minor release.
Parameters
block
the compound shape block.
subshape
the shape block to append.