| GetDefinedOrNull(TEnum) | Returns value if it is defined in TEnum; otherwise, returns . |
| GetDefinedOrNull(Int64) | Returns the TEnum value associated with value if it is defined in TEnum; otherwise, returns . |
| GetDefinedOrNull(ReadOnlySpanChar) | Returns the TEnum value associated with value if it is defined in TEnum; otherwise, returns . The search is case-sensitive. |
| GetDefinedOrNull(String) | Returns the TEnum value associated with value if it is defined in TEnum; otherwise, returns . The search is case-sensitive. |
| GetDefinedOrNull(StringSegment) | Returns the TEnum value associated with value if it is defined in TEnum; otherwise, returns . The search is case-sensitive. |
| GetDefinedOrNull(UInt64) | Returns the TEnum value associated with value if it is defined in TEnum; otherwise, returns . |