Mnemonic.fromString constructor
      
      Mnemonic.fromString(
    
- String mnemonicStr
 
Creates a new Mnemonic instance from a mnemonic phrase provided as a string. The provided mnemonic string is normalized into a list of words.
Implementation
Mnemonic.fromString(String mnemonicStr)
    : _mnemonicList = _normalize(mnemonicStr);