original_string: public function datum($indices)
      {
          $this->assertData();
  
          $index = $this->index($indices);
          if (isset($this->data[$index])) {
              return $this->data[$index];
          } else {
              return null;
          }
      }
code: public function datum($indices)
      {
          $this->assertData();
  
          $index = $this->index($indices);
          if (isset($this->data[$index])) {
              return $this->data[$index];
          } else {
              return null;
          }
      }
code_tokens: public function datum ( $ indices ) { $ this -> assertData ( ) ; $ index = $ this -> index ( $ indices ) ; if ( isset ( $ this -> data [ $ index ] ) ) { return $ this -> data [ $ index ] ; } else { return null ; } }
docstring: Gets a single data point.
  
  @param array $indices An array of all value indices
  
  @return string
docstring_tokens: Gets a single data point .