presto-parser/src/main/java/io/prestosql/sql/tree/CharLiteral.java/CharLiteral/equals
class CharLiteral:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        CharLiteral that = (CharLiteral) o;
        return Objects.equals(value, that.value);
    }