nameWindow name used as its persistent ID and displayed title; ### can separate the title from the ID.
p_openOptional open state in Uint8Array[0]. Write only 0 (closed) or 1 (open); the close button writes 0. Null omits the close button. The native call accesses this writable backing memory directly.
flagsImGuiWindowFlags options controlling this operation; combine compatible flag bits with |.
True when window contents should be submitted; false when collapsed or fully clipped. Call End() even when false.
Begin() pushes the window onto the stack and starts appending content.
Call End() for every Begin(), even when it returns false.
A false return means the window is collapsed or fully clipped; skip its
contents, but still call End(). Unlike most BeginXXX()/EndXXX()
pairs, both Begin() and BeginChild() always require their matching end
call.
Pass a Uint8Array as p_open to show a close button. Its first element
holds the open state; clicking the close button writes 0 to p_open[0].
Pass null to omit the close button. The application decides whether to
call Begin() again based on that state.
Multiple Begin()/End() pairs may append to the same window in one
frame. Only the first Begin() considers flags and p_open.
The bottom of the window stack always contains the window named "Debug".
Begin or append to a window.