put common function in ds-common

mems/examples/ds-common/src/lib.rs

 pub mod dyn_topo;
 pub mod static_topo;
 
-const STATIC_TOPO_DF_NAME: &str = "static_topo";
-const TERMINAL_DF_NAME: &str = "terminal_cn_dev";
-const POINT_DF_NAME: &str = "point_terminal_phase";
+pub const STATIC_TOPO_DF_NAME: &str = "static_topo";
+pub const TERMINAL_DF_NAME: &str = "terminal_cn_dev";
+pub const POINT_DF_NAME: &str = "point_terminal_phase";
 pub const DYN_TOPO_DF_NAME: &str = "dyn_topo";
 pub const DEV_TOPO_DF_NAME: &str = "dev_topo";
 pub const DEV_CONDUCTOR_DF_NAME: &str = "dev_ohm";

mems/examples/ds-dyn-topo/src/lib.rs

@@ -2,10 +2,10 @@ use std::collections::HashMap;
 
 use arrow_schema::{DataType, Field, Schema};
 
+use ds_common::{DEV_TOPO_DF_NAME, DYN_TOPO_DF_NAME, POINT_DF_NAME, STATIC_TOPO_DF_NAME, TERMINAL_DF_NAME};
+use ds_common::static_topo::{read_edges, read_points, read_terminals};
 use eig_domain::DataUnit;
 use mems::model::{get_df_from_in_plugin, get_meas_from_plugin_input, get_wasm_result, ModelType, PluginInput, PluginOutput};
-use ds_common::static_topo::{read_edges, read_points, read_terminals};
-
 
 #[no_mangle]
 pub unsafe fn run(ptr: i32, len: u32) -> u64 {

mems/examples/ds-pf-input/src/lib.rs

 use arrow_schema::{DataType, Field, Schema};
 
 use ds_common::{DEV_TOPO_DF_NAME, DYN_TOPO_DF_NAME};
+use ds_common::dyn_topo::{read_dev_topo, read_dyn_topo};
 use mems::model::{get_meas_from_plugin_input, get_wasm_result, PluginInput, PluginOutput};
 
 #[no_mangle]