var directions = require( 'directions' );

var someDirections = directions();

someDirections.fromTo( 'alpha', 'idle', 1.2 );
someDirections.fromTo( 'idle', 'rolled', 1 );
someDirections.fromTo( 'rolled', 'idle', 3 );
someDirections.fromTo( 'idle', 'omega', 1.5 );

var data = someDirections.getPath( 'alpha', 'omega' );

console.log( data.cost ); // 2.7
console.log( data.path ); // [ 'alpha', 'idle', 'omega' ]
console.log( someDirections.getPath( 'alpha', 'rolled', 'omega' ) ); // [ 'alpha', 'idle', 'rolled', 'idle', 'omega' ]
console.log( someDirections.fromTo( 'alpha', 'idle' ) ); // 1.2