collapse vscode code example

Example 1: collapse all code vscode

Use :
Ctrl + K + 0 to fold all 
Ctrl + K + J to unfold all

Example 2: collapse vscode key

ctrl + 0  to 9  : "to collaapsse level" 
ctrl + j  : "to Fold all"

Example 3: visual studio code collapse all

// Fold
Ctrl + K + 0 // fold everything that could be folded
Ctrl + K + 1 // fold just the main branches

// Unfold
Ctrl + K + J // unfold everything