txt: ## -.md
  .=
  
  Combined from primary sources listed below.
  
  # [In Operators](#___top "go to top of document")[§](#(Operators)_infix_.= "direct link")
  
  See primary documentation
  [in context](/language/operators#infix_.=)
  for **infix .=**.
  
  Calls the right-side method on the value in the left-side container, replacing the resulting value in the left-side container.
  
  In most cases, this behaves identically to the postfix mutator, but the precedence is lower:
  
  ```raku
  my $a = -5;
  say ++$a.=abs;
  # OUTPUT: «6␤»
  
  ```
  
  ```raku
  say ++$a .= abs;
  # OUTPUT: «Cannot modify an immutable Int␤
  #           in block <unit> at <tmp> line 1␤␤»
  
  ```
  