Function generate_types_rs_file_code 

pub fn generate_types_rs_file_code(
    workflow: &Workflow,
    custom_types: &HashMap<String, String>,
) -> Result<String, Error>

Generates the main Rust code for the workflow package and creates the types.rs file

Arguments

• workflow_index - The index of the workflow

Returns

• A String containing the Rust code to be written to types.rs file in the workflow package