Constant lexical_parse_float::format::CSHARP7_LITERAL

pub const CSHARP7_LITERAL: u128 = NumberFormatBuilder::new().digit_separator(num::NonZeroU8::new(b'_')).required_fraction_digits(true).no_special(true).internal_digit_separator(true).consecutive_digit_separator(true).build(); // 202_824_096_038_269_144_941_898_147_824_654u128

Number format for a C#7 literal floating-point number.