question: is valid email boolean . concode_field_sep PlaceHolder placeHolder concode_field_sep String makeAvatarUrl concode_elem_sep String getPreStringSplit concode_elem_sep String getFirstName concode_elem_sep String getPostStringSplit
target: boolean function ( CharSequence arg0 ) { return arg0 != null && android . util . Patterns . EMAIL_ADDRESS . matcher ( arg0 ) . matches ( ) ; }