SPLTokenProgram.uiAmountToAmount constructor
      
      SPLTokenProgram.uiAmountToAmount({ 
    
- required SPLTokenUiAmountToAmountLayout layout,
- required SolAddress mint,
- SolAddress programId = SPLTokenProgramConst.tokenProgramId,
Convert a UiAmount of tokens to a little-endian u64 raw Amount, using
the given mint. In this version of the program, the mint can only
specify the number of decimals.
Implementation
factory SPLTokenProgram.uiAmountToAmount(
    {required SPLTokenUiAmountToAmountLayout layout,
    required SolAddress mint,
    SolAddress programId = SPLTokenProgramConst.tokenProgramId}) {
  return SPLTokenProgram(
      layout: layout, keys: [mint.toReadOnly()], programId: programId);
}