This is nothing to do with content assist.
You can see the block of code as explained below.
Collapse all methods(By pressing Ctrl+Shift+NUM_KEYPAD_DIVIDE. Note you can expand all methods by pressing Ctrl+Shift+NUM_KEYPAD_MULTIPLY)
Hover the mouse cursor towards method collapse icon "+" as shown below.
You will see the content of the method in a popup window. Now press F2 to freez this popup and press ESC to close the popup. Scroll back and forth to see the content. Note that this works for methods, javadocs and import statements only and not for other block statements inside methods and on CLASS body.
Refer How to use Coffee-Bytes code folding for if block folding and try to check the if block content as said above.
Also you can check the scope of block statements by keeping caret after the block start("{") or block end("}") flower brackets and double clicking on it.
See below
You can expand or reduce the block selection by pressing Alt + Shift + Up Arrow and Alt + Shift + Down Arrow respectively and jump to matching bracket(Like "( or )", "{ or }") by keeping caret after the bracket and pressing Ctrl + Shift + P