add API sample
add API sample

dimagol/trex-core,kisel/trex-core,kisel/trex-core,kisel/trex-core,dimagol/trex-core,dimagol/trex-core,kisel/trex-core,dimagol/trex-core,kisel/trex-core,kisel/trex-core,dimagol/trex-core,dimagol/trex-core