pub trait WriteGraph {
// Required methods
fn write_txt(&self, filename: &str) -> Result<()>;
fn write_gzipped(&self, filename: &str) -> Result<()>;
}
pub trait WriteGraph {
// Required methods
fn write_txt(&self, filename: &str) -> Result<()>;
fn write_gzipped(&self, filename: &str) -> Result<()>;
}