class_docstr: Printer which converts a SymPy expression into a maple code.
code: def _print_MatrixElement(self, expr):
      return "{parent}[{i_maple}, {j_maple}]".format(
          parent=self.parenthesize(
              expr.parent, PRECEDENCE["Atom"], strict=True
          ),
          i_maple=self._print(expr.i + 1),
          j_maple=self._print(expr.j + 1),
      )
  
imports: from sympy.core import S
  from sympy.core.numbers import Integer, IntegerConstant, equal_valued
  from sympy.printing.codeprinter import CodePrinter
  from sympy.printing.precedence import precedence, PRECEDENCE
  import sympy
label_desc: Use image node_id 22 for calling the MapleCodePrinter obj's underlying member method code with example usage: obj._print_MatrixElement(expr) and returns: str