stl => stateless
stf => stateful
alt+enter, select element => add pading or something
select children and press alt+enter => add into column/row or something
cut/copy a line of code: ctrl+x / ctrl+c, paste with ctrl+V
ctrl+shift+I =>easily check the original code without leave file
ctrl+W =>easily select entire widget without mouse move
ctrl+alt+L => tidy code
sidebar Flutter outline => easily manage code
ctrl+alt+O => remove unused package
ctrl+shift+A => find back your shortcut