boolean (@NotNull GrUnaryExpression postfixExp1, @NotNull GrUnaryExpression postfixExp2) { final IElementType sign1 = postfixExp1.getOperationTokenType(); final IElementType sign2 = postfixExp2.getOperationTokenType(); if (sign1 != sign2) { return false; } final GrExpression operand1 = postfixExp1.getOperand(); final GrExpression operand2 = postfixExp2.getOperand(); return expressionsAreEquivalent(operand1, operand2); }