boolean (@NotNull GrUnaryExpression prefixExp1, @NotNull GrUnaryExpression prefixExp2) { final IElementType sign1 = prefixExp1.getOperationTokenType(); final IElementType sign2 = prefixExp2.getOperationTokenType(); if (sign1 != sign2) { return false; } final GrExpression operand1 = prefixExp1.getOperand(); final GrExpression operand2 = prefixExp2.getOperand(); return expressionsAreEquivalent(operand1, operand2); }